Staff profile

Responsibilities within department

Head of Condensed Matter Section

Teaching activity

Level 1: Modern Physics

Research interests

• Programming and implementing first principle and empirical computer simulations for solid state, liquid and molecular systems.
• Density functional perturbation theory.
• First principles calculation of spectroscopic measurements.
• Computer simulations of structural and vibrational properties.
• Development of new techniques to calculate excited electronic states.
• Large scale computer simulations using high performance computing.

Conference Paper

• Numerical Investigation of Ultrafast interaction between THz Fields and Crystalline Materials
  
  Klarskov, P., Clark, S. J., & Jepsen, P. U. (2014). Numerical Investigation of Ultrafast interaction between THz Fields and Crystalline Materials. In Conference on Lasers and Electro-Optics. Institute of Electrical and Electronics Engineers.
• Screened Exchange Calculations of Semiconductor Band Structures
  
  Gibson, M. C., Clark, S. J., Brand, S., & Abram, R. A. (2005). Screened Exchange Calculations of Semiconductor Band Structures. In J. Menéndez & C. G. Van de Walle (Eds.), AIP Conference Proceedings (pp. 1125-1126). American Institute of Physics. https://doi.org/10.1063/1.1994505
• Structural and electronic properties of HgTe quantum dots
  
  Clark, S., Wang, X., & Abram, R. (2005). Structural and electronic properties of HgTe quantum dots. In J. Menendez & C. VanDeWalle (Eds.), AIP CONFERENCE PROCEEDINGS (pp. 589-590). AMER INST PHYSICS.
• First-principles calculations of 2x2 reconstructions of GaN surfaces
  
  Salinero, V., Gibson, M., Brand, S., Clark, S., & Abram, R. (2005). First-principles calculations of 2x2 reconstructions of GaN surfaces. In J. Menendez & C. VanDeWalle (Eds.), AIP CONFERENCE PROCEEDINGS (pp. 373-374). AMER INST PHYSICS.
• Demonstrating the effectiveness of a nonlocal density functional description of exchange and correlation
  
  Rushton, P., & Clark, S. (2003). Demonstrating the effectiveness of a nonlocal density functional description of exchange and correlation. In N. Gidopoulos & S. Wilson (Eds.), PROGRESS IN THEORETICAL CHEMISTRY AND PHYSICS (pp. 169-183). SPRINGER.
• Structure, dynamics and molecular properties of liquid crystals molecules and fragments from first principles computer simulations performed on Cray T3D
  
  Adam, C., Clark, S., & Crain, J. (1998). Structure, dynamics and molecular properties of liquid crystals molecules and fragments from first principles computer simulations performed on Cray T3D. In J. Rutkowska, S. Klosowicz, J. Zielinski, & J. Zmija (Eds.), PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) (pp. 171-174). SPIE-INT SOC OPTICAL ENGINEERING. https://doi.org/10.1117/12.299963
• Electronic structure calculations of liquid crystal molecules: Application to chiral solutes.
  
  Clark, S., Ackland, G., & Crain, J. (1998). Electronic structure calculations of liquid crystal molecules: Application to chiral solutes. In J. Rutkowska, S. Klosowicz, J. Zielinski, & J. Zmija (Eds.), PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) (pp. 166-170). SPIE-INT SOC OPTICAL ENGINEERING. https://doi.org/10.1117/12.299962
• Structural refinement and stability of silicon XII
  
  Maclean, J., Hatton, P., Crain, J., Piltz, R., & Clark, S. (1996). Structural refinement and stability of silicon XII. In R. Cernik, R. Delhez, & E. Mittemeijer (Eds.), MATERIALS SCIENCE FORUM (pp. 595-599). TRANSTEC PUBLICATIONS LTD.
• Metastable Structures Of Tetrahedral Semiconductors
  
  Hatton, P., Crain, J., Ackland, G., Clark, S., & Piltz, R. (1994). Metastable Structures Of Tetrahedral Semiconductors. In S. C. Schmidt, J. W. Shaner, G. A. Samara, & M. Ross (Eds.), High-Pressure Science and Technology (pp. 549-552). American Institute of Physics.

Journal Article

• Oxide Ion Dynamics and Structure–Property Relationships in A 3 OhTd 2 O 7.5 Ionic Conductors (A = Ba, Sr; Oh = Y; Td = Ga, Zn)
  
  Wagstaff, O., Avdeev, M., Clark, S. J., Evans, J. S. O., & Evans, I. R. (2025). Oxide Ion Dynamics and Structure–Property Relationships in A 3 OhTd 2 O 7.5 Ionic Conductors (A = Ba, Sr; Oh = Y; Td = Ga, Zn). Chemistry of Materials, 37(9), 3492-3503. https://doi.org/10.1021/acs.chemmater.5c00426
• Insights into topochemical versus stress-induced high-pressure reactivity of azobenzene by single crystal X-ray diffraction †
  
  Agati, M., Romi, S., Fanetti, S., Radacki, K., Hanfland, M., Braunschweig, H., Marder, T. B., Clark, S. J., Friedrich, A., & Bini, R. (2025). Insights into topochemical versus stress-induced high-pressure reactivity of azobenzene by single crystal X-ray diffraction †. Chemical Science. Advance online publication. https://doi.org/10.1039/d5sc00432b
• Muon spectroscopy investigation of anomalous dynamic magnetism in NiI2
  
  Breeze, T. L., Huddart, B. M., Hernández-Melián, A., Bentley, N. P., Mayoh, D. A., Wood, G. D. A., Balakrishnan, G., Wilkinson, J., Pratt, F. L., Hicken, T. J., Clark, S. J., & Lancaster, T. (2025). Muon spectroscopy investigation of anomalous dynamic magnetism in NiI2. Physical Review B, 111(10), Article 104420. https://doi.org/10.1103/physrevb.111.104420
• Pressure-Induced Phase Transition and Broadband Light Emission of Lead-Free Double Perovskite Cs2TiBr6
  
  Pakornchote, T., Sukmas, W., Chatraphorn, S., Clark, S. J., & Bovornratanaraks, T. (2025). Pressure-Induced Phase Transition and Broadband Light Emission of Lead-Free Double Perovskite Cs2TiBr6. Journal of Alloys and Compounds, 1020, Article 179278. https://doi.org/10.1016/j.jallcom.2025.179278
• Anisotropic Skyrmion and Multi-q Spin Dynamics in Centrosymmetric Gd2PdSi3
  
  Gomilšek, M., Hicken, T., Wilson, M., Franke, K., Huddart, B., Štefančič, A., Holt, S., Balakrishnan, G., Mayoh, D., Birch, M., Moody, S., Luetkens, H., Guguchia, Z., Telling, M., Baker, P., Clark, S., & Lancaster, T. (2025). Anisotropic Skyrmion and Multi-q Spin Dynamics in Centrosymmetric Gd2PdSi3. Physical Review Letters, 134(4), Article 046702. https://doi.org/10.1103/physrevlett.134.046702
• La₂O₂MQ₂ phases: stability and synthetic challenges
  
  Hebberd, G. R., Mendis, B., Bowen, L., Clark, S. J., & Mccabe, E. E. (2024). La₂O₂MQ₂ phases: stability and synthetic challenges. Solid State Sciences, 157, Article 107719. https://doi.org/10.1016/j.solidstatesciences.2024.107719
• Asymmetric phase diagram and dimensional crossover in a system of spin-12 dimers under applied hydrostatic pressure
  
  Coak, M. J., Curley, S. P. M., Hawkhead, Z., Tidey, J. P., Graf, D., Clark, S. J., Sengupta, P., Manson, Z. E., Lancaster, T., Goddard, P. A., & Manson, J. L. (2023). Asymmetric phase diagram and dimensional crossover in a system of spin-12 dimers under applied hydrostatic pressure. Physical Review B, 108(22), Article 224431. https://doi.org/10.1103/physrevb.108.224431
• Band-filling-controlled magnetism from transition metal intercalation in N1/3NbS2 revealed with first-principles calculations
  
  Hawkhead, Z., Hicken, T. J., Bentley, N. P., Huddart, B. M., Clark, S. J., & Lancaster, T. (2023). Band-filling-controlled magnetism from transition metal intercalation in N1/3NbS2 revealed with first-principles calculations. Physical Review Materials, 7(11), Article 114002. https://doi.org/10.1103/physrevmaterials.7.114002
• Twist-induced interlayer charge buildup in a WS2 bilayer revealed by electron Compton scattering and density functional theory
  
  Talmantaite, A., Xie, Y., Cohen, A., Mohapatra, P., Ismach, A., Mizoguchi, T., Clark, S., & Mendis, B. (2023). Twist-induced interlayer charge buildup in a WS2 bilayer revealed by electron Compton scattering and density functional theory. Physical Review B: Condensed Matter and Materials Physics, 107(23), Article 235424. https://doi.org/10.1103/physrevb.107.235424
• μSR investigation of magnetism in κ−(ET)2X : Antiferromagnetism
  
  Huddart, B., Lancaster, T., Blundell, S., Guguchia, Z., Taniguchi, H., Clark, S., & Pratt, F. (2023). μSR investigation of magnetism in κ−(ET)2X : Antiferromagnetism. Physical Review Research, 5(1), Article 013015. https://doi.org/10.1103/physrevresearch.5.013015
• Phase transformations and vibrational properties of hybrid organic–inorganic perovskite MAPbI 3 bulk at high pressure
  
  Ardimas, Pakornchote, T., Sukmas, W., Chatraphorn, S., Clark, S. J., & Bovornratanaraks, T. (2023). Phase transformations and vibrational properties of hybrid organic–inorganic perovskite MAPbI 3 bulk at high pressure. Scientific Reports, 13(1), Article 16854. https://doi.org/10.1038/s41598-023-43020-1
• Non-collinear spin in electronic structure calculations
  
  Clark, S. J., & Hawkhead, Z. (2023). Non-collinear spin in electronic structure calculations. Contemporary Physics, 64(2), 111-126. https://doi.org/10.1080/00107514.2023.2279810
• Tribological Behavior of Microalloyed Cu50Zr50 Alloy
  
  Younes, A., De la Flor, S., Clark, S., Nutter, J., Birkett, M., Watson, J., Unthank, M., & Gonzalez, S. (2022). Tribological Behavior of Microalloyed Cu50Zr50 Alloy. Journal of Tribology, 144(2), Article 021706. https://doi.org/10.1115/1.4052363
• Energy-gap driven low-temperature magnetic and transport properties in Cr1/3MS2(M = Nb, Ta)
  
  Hicken, T., Hawkhead, Z., Wilson, M., Huddart, B., Hall, A., Balakrishnan, G., Wang, C., Pratt, F., Clark, S., & Lancaster, T. (2022). Energy-gap driven low-temperature magnetic and transport properties in Cr1/3MS2(M = Nb, Ta). Physical Review B, 105(6), Article L060407. https://doi.org/10.1103/physrevb.105.l060407
• Identification of Graphene Dispersion Agents through Molecular Fingerprints
  
  Goldie, S. J., Degiacomi, M. T., Jiang, S., Clark, S. J., Erastova, V., & Coleman, K. S. (2022). Identification of Graphene Dispersion Agents through Molecular Fingerprints. ACS Nano, 16(10). https://doi.org/10.1021/acsnano.2c04406
• Intrinsic nature of spontaneous magnetic fields in superconductors with time-reversal symmetry breaking
  
  Huddart, B., Onuorah, I., Isah, M., Bonfa, P., Blundell, S., Clark, S., De Renzi, R., & Lancaster, T. (2021). Intrinsic nature of spontaneous magnetic fields in superconductors with time-reversal symmetry breaking. Physical Review Letters, 127(23), Article 237002. https://doi.org/10.1103/physrevlett.127.237002
• Anomalous magnetic exchange in a dimerized quantum magnet composed of unlike spin species
  
  Curley, S., Huddart, B., Kamenskyi, D., Coak, M., Williams, R., Ghannadzadeh, S., Schneider, A., Okubo, S., Sakurai, T., Ohta, H., Tidey, J., Graf, D., Clark, S., Blundell, S., Pratt, F., Telling, M., Lancaster, T., Manson, J., & Goddard, P. (2021). Anomalous magnetic exchange in a dimerized quantum magnet composed of unlike spin species. Physical Review B, 104(21), Article 214435. https://doi.org/10.1103/physrevb.104.214435
• Exploring the nature of the fergusonite–scheelite phase transition and ionic conductivity enhancement by Mo6+ doping in LaNbO4
  
  Auckett, J. E., Lopez-Odriozola, L., Clark, S. J., & Radosavljevic Evans, I. (2021). Exploring the nature of the fergusonite–scheelite phase transition and ionic conductivity enhancement by Mo6+ doping in LaNbO4. Journal of Materials Chemistry A: Materials for Energy and Sustainability, 9(7), 4091-4102. https://doi.org/10.1039/d0ta07453e
• Calculation and interpretation of classical turning surfaces in solids
  
  Kaplan, A. D., Clark, S. J., Burke, K., & Perdew, J. P. (2021). Calculation and interpretation of classical turning surfaces in solids. Npj Computational Materials, 7, Article 25. https://doi.org/10.1038/s41524-020-00479-0
• The metal–insulator phase change in vanadium dioxide and its applications
  
  Lu, H., Clark, S., Guo, Y., & Robertson, J. (2021). The metal–insulator phase change in vanadium dioxide and its applications. Journal of Applied Physics, 129(24), Article 240902. https://doi.org/10.1063/5.0027674
• Pressure-Induced Polymerization of Polycyclic Arene–Perfluoroarene Cocrystals: Single Crystal X-ray Diffraction Studies, Reaction Kinetics, and Design of Columnar Hydrofluorocarbons
  
  Friedrich, A., Collings, I. E., Dziubek, K. F., Fanetti, S., Radacki, K., Ruiz-Fuertes, J., Pellicer-Porres, J., Hanfland, M., Sieh, D., Bini, R., Clark, S. J., & Marder, T. B. (2020). Pressure-Induced Polymerization of Polycyclic Arene–Perfluoroarene Cocrystals: Single Crystal X-ray Diffraction Studies, Reaction Kinetics, and Design of Columnar Hydrofluorocarbons. Journal of the American Chemical Society, 142(44), 18907-18923. https://doi.org/10.1021/jacs.0c09021
• Origin of Magnetic Ordering in a Structurally Perfect Quantum Kagome Antiferromagnet
  
  Arh, T., Gomilšek, M., Prelovšek, P., Pregelj, M., Klanjšek, M., Ozarowski, A., Clark, S., Lancaster, T., Sun, W., Mi, J.-X., & Zorko, A. (2020). Origin of Magnetic Ordering in a Structurally Perfect Quantum Kagome Antiferromagnet. Physical Review Letters, 125(2), Article 027203. https://doi.org/10.1103/physrevlett.125.027203
• Magnetism and Néel skyrmion dynamics in GaV4S8−ySey
  
  Hicken, T., Holt, S., Franke, K., Hawkhead, Z., Štefančič, A., Wilson, M., Gomilšek, M., Huddart, B., Clark, S., Lees, M., Pratt, F., Blundell, S., Balakrishnan, G., & Lancaster, T. (2020). Magnetism and Néel skyrmion dynamics in GaV4S8−ySey. Physical Review Research, 2(3), Article 032001. https://doi.org/10.1103/physrevresearch.2.032001
• Modelling the enthalpy change and transition temperature dependence of the metal–insulator transition in pure and doped vanadium dioxide
  
  Lu, H., Clark, S., Guo, Y., & Robertson, J. (2020). Modelling the enthalpy change and transition temperature dependence of the metal–insulator transition in pure and doped vanadium dioxide. Physical Chemistry Chemical Physics, 22(24), 13474-13478. https://doi.org/10.1039/d0cp01929a
• Hybrid band offset calculation for heterojunction interfaces between disparate semiconductors
  
  Zhang, Z., Guo, Y., Lu, H., Clark, S. J., & Robertson, J. (2020). Hybrid band offset calculation for heterojunction interfaces between disparate semiconductors. Applied Physics Letters, 116(13), Article 131602. https://doi.org/10.1063/1.5135376
• Optimizing geophysical muon radiography using information theory
  
  Benton, C., Mitchell, C., Coleman, M., Paling, S., Lincoln, D., Thompson, L., Clark, S., & Gluyas, J. (2020). Optimizing geophysical muon radiography using information theory. Geophysical Journal International, 220(2), 1078-1094. https://doi.org/10.1093/gji/ggz503
• Enhancement of light emission in Bragg monolayer-thick quantum well structures
  
  Pozina, G., Ivanov, K. A., Morozov, K. M., Girshova, E. I., Egorov, A. Y., Clark, S. J., & Kaliteevski, M. A. (2019). Enhancement of light emission in Bragg monolayer-thick quantum well structures. Scientific Reports, 9(1), Article 10162. https://doi.org/10.1038/s41598-019-46646-2
• Band Offset Models of Three-Dimensionally Bonded Semiconductors and Insulators
  
  Guo, Y., Li, H., Clark, S., & Robertson, J. (2019). Band Offset Models of Three-Dimensionally Bonded Semiconductors and Insulators. Journal of Physical Chemistry C, 123(9), 5562-5570. https://doi.org/10.1021/acs.jpcc.9b00152
• Terahertz time-domain spectroscopy of zone-folded acoustic phonons in 4H and 6H silicon carbide
  
  Tarekegne, A. T., Zhou, B., Kaltenecker, K., Iwaszczuk, K., Clark, S., & Jepsen, P. U. (2019). Terahertz time-domain spectroscopy of zone-folded acoustic phonons in 4H and 6H silicon carbide. Optics Express, 27(3), 3618-3628. https://doi.org/10.1364/oe.27.003618
• Complex Low Energy Tetrahedral Polymorphs of Group IV Elements from First Principles
  
  He, C., Shi, X., Clark, S., Li, J., Pickard, C. J., Ouyang, T., Zhang, C., Tang, C., & Zhong, J. (2018). Complex Low Energy Tetrahedral Polymorphs of Group IV Elements from First Principles. Physical Review Letters, 121(17), Article 175701. https://doi.org/10.1103/physrevlett.121.175701
• Quantum magnetism in molecular spin ladders probed with muon-spin spectroscopy
  
  Lancaster, T., Xiao, F., Huddart, B., Williams, R., Pratt, F., Blundell, S., Clark, S., Scheuermann, R., Goko, T., Ward, S., Manson, J., Rüegg, C., & Krämer, K. (2018). Quantum magnetism in molecular spin ladders probed with muon-spin spectroscopy. New Journal of Physics, 20(10), Article 103002. https://doi.org/10.1088/1367-2630/aae21a
• Magnetic phases of skyrmion-hosting GaV4S8−ySey (y = 0, 2, 4, 8) probed with muon spectroscopy
  
  Franke, K. J., Huddart, B. M., Hicken, T. J., Xiao, F., Blundell, S. J., Pratt, F. L., Crisanti, M., Barker, J. A., Clark, S. J., Štefančič, A., Hatnean, M. C., Balakrishnan, G., & Lancaster, T. (2018). Magnetic phases of skyrmion-hosting GaV4S8−ySey (y = 0, 2, 4, 8) probed with muon spectroscopy. Physical Review B, 98(5), Article 054428. https://doi.org/10.1103/physrevb.98.054428
• Many-body renormalization of forces in f-electron materials
  
  Plekhanov, E., Hasnip, P., Sacksteder, V., Probert, M., Clark, S. J., Refson, K., & Weber, C. (2018). Many-body renormalization of forces in f-electron materials. Physical Review B, 98(7), Article 075129. https://doi.org/10.1103/physrevb.98.075129
• Understanding cationic polymer adsorption on mineral surfaces: kaolinite in cement aggregates
  
  Jacquet, A., Geatches, D. L., Clark, S. J., & Greenwell, H. C. (2018). Understanding cationic polymer adsorption on mineral surfaces: kaolinite in cement aggregates. Minerals, 8(4), Article 130. https://doi.org/10.3390/min8040130
• Implications of bond disorder in a S=1 kagome lattice
  
  Manson, J. L., Brambleby, J., Goddard, P. A., Spurgeon, P. M., Villa, J. A., Liu, J., Ghannadzadeh, S., Foronda, F., Singleton, J., Lancaster, T., Clark, S. J., Thomas, I. O., Xiao, F., Williams, R. C., Pratt, F. L., Blundell, S. J., Topping, C. V., Baines, C., Campana, C., & Noll, B. (2018). Implications of bond disorder in a S=1 kagome lattice. Scientific Reports, 8(1), Article 4745. https://doi.org/10.1038/s41598-018-23054-6
• Quantum mechanical tunneling in the automerization of cyclobutadiene
  
  Schoonmaker, R., Lancaster, T., & Clark, S. (2018). Quantum mechanical tunneling in the automerization of cyclobutadiene. Journal of Chemical Physics, 148(10), Article 104109. https://doi.org/10.1063/1.5019254
• Self-interaction free local exchange potentials applied to metallic systems
  
  Clark, S. J., Hollins, T. W., Refson, K., & Gidopoulos, N. I. (2017). Self-interaction free local exchange potentials applied to metallic systems. Journal of Physics: Condensed Matter, 29(37), Article 374002. https://doi.org/10.1088/1361-648x/aa7ba6
• Exchange constants in molecule-based magnets derived from density functional methods
  
  Thomas, I., Clark, S., & Lancaster, T. (2017). Exchange constants in molecule-based magnets derived from density functional methods. Physical Review B, 96(9), Article 094403. https://doi.org/10.1103/physrevb.96.094403
• Anharmonic Bloch oscillations of electrons in electrically biased superlattices
  
  Ivanov, K., Girshova, E., Kaliteevski, M., CLark, S., & Gallant, A. (2016). Anharmonic Bloch oscillations of electrons in electrically biased superlattices. Semiconductors, 50(11), 1463-1468. https://doi.org/10.1134/s1063782616110117
• Transverse field muon-spin rotation measurement of the topological anomaly in a thin film of MnSi
  
  Lancaster, T., Xiao, F., Salman, Z., Thomas, I., Blundell, S., Pratt, F., Clark, S., Prokscha, T., Suter, A., Zhang, S., Baker, A., & Hesjedal, T. (2016). Transverse field muon-spin rotation measurement of the topological anomaly in a thin film of MnSi. Physical Review B, 93(14), Article 140412(R). https://doi.org/10.1103/physrevb.93.140412
• Reproducibility in density functional theory calculations of solids
  
  Lejaeghere, K., Bihlmayer, G., Bjoerkman, T., Blaha, P., Bluegel, S., Blum, V., Caliste, D., Castelli, I. E., Clark, S. J., Dal Corso, A., de Gironcoli, S., Deutsch, T., Dewhurst, J. K., Di Marco, I., Draxl, C., Dulak, M., Eriksson, O., Flores-Livas, J. A., Garrity, K. F., … Cottenier, S. (2016). Reproducibility in density functional theory calculations of solids. Science, 351(6280), Article aad3000. https://doi.org/10.1126/science.aad3000
• Insights into the Behaviour of Biomolecules on the Early Earth: The Concentration of Aspartate by Layered Double Hydroxide Minerals
  
  Grégoire, B., Erastova, V., Geatches, D. L., Clark, S. J., Greenwell, H. C., & Fraser, D. G. (2016). Insights into the Behaviour of Biomolecules on the Early Earth: The Concentration of Aspartate by Layered Double Hydroxide Minerals. Geochimica Et Cosmochimica Acta, 176, 239-258. https://doi.org/10.1016/j.gca.2015.12.026
• Muon-spin relaxation study of the double perovskite insulators Sr2 BOsO6 (B  =  Fe, Y, ln)
  
  Williams, R., Xiao, F., Thomas, I., Clark, S., Lancaster, T., Cornish, G., Blundell, S., Hayes, W., Paul, A., Felser, C., & Jansen, M. (2016). Muon-spin relaxation study of the double perovskite insulators Sr2 BOsO6 (B  =  Fe, Y, ln). Journal of Physics: Condensed Matter, 28(7), Article 076001. https://doi.org/10.1088/0953-8984/28/7/076001
• Super-radiant mode in InAs-monolayer-based Bragg structures
  
  Pozina, G., Kaliteevski, M., Nikitina, E., Denisov, D., Polyakov, N., Pirogov, E., Goray, L., Gubaydullin, A., Ivanov, K., Kaliteevskaya, N., Egorov, A. Y., & Clark, S. (2015). Super-radiant mode in InAs-monolayer-based Bragg structures. Scientific Reports, 5, Article 14911. https://doi.org/10.1038/srep14911
• Transverse field muon-spin rotation signature of the skyrmion-lattice phase in Cu2OSeO3
  
  Lancaster, T., Williams, R., Thomas, I., Xiao, F., Pratt, F., Blundell, S., Loudon, J., Hesjedal, T., Clark, S., Hatton, P., Ciomaga Hatnean, M., Keeble, D., & Balakrishnan, G. (2015). Transverse field muon-spin rotation signature of the skyrmion-lattice phase in Cu2OSeO3. Physical Review B, 91(22), Article 224408. https://doi.org/10.1103/physrevb.91.224408
• The effects of screening length in the non-local screened-exchange functional
  
  Guo, Y., Robertson, J., & Clark, S. J. (2015). The effects of screening length in the non-local screened-exchange functional. Journal of Physics: Condensed Matter, 27(2), Article 025501. https://doi.org/10.1088/0953-8984/27/2/025501
• Magnetostructural relationship in the tetrahedral spin-chain oxide CsCoO2
  
  Ali, N., Williams, R., Xiao, F., Clark, S., Lancaster, T., Blundell, S., Sheptyakov, D., & Jansen, M. (2015). Magnetostructural relationship in the tetrahedral spin-chain oxide CsCoO2. Physical Review B, 91(2), Article 024419. https://doi.org/10.1103/physrevb.91.024419
• Density functional theory in the solid state
  
  Hasnip, P. J., Refson, K., Probert, M. I., Yates, J. R., Clark, S. J., & Pickard, C. J. (2014). Density functional theory in the solid state. Philosophical Transactions of the Royal Society of London A: Mathematical, Physical and Engineering Sciences., 372(2011), Article 20130270. https://doi.org/10.1098/rsta.2013.0270
• Calculation of metallic and insulating phases of V2O3 by hybrid density functionals
  
  Guo, Y., Clark, S. J., & Robertson, J. (2014). Calculation of metallic and insulating phases of V2O3 by hybrid density functionals. Journal of Chemical Physics, 140(5), Article 054702. https://doi.org/10.1063/1.4863325
• Nature of the electronic band gap in lanthanide oxides
  
  Gillen, R., Clark, S., & Robertson, J. (2013). Nature of the electronic band gap in lanthanide oxides. Physical Review B, 87(12), Article 125116. https://doi.org/10.1103/physrevb.87.125116
• Structural Characterization and Physical Properties of the New Transition Metal Oxyselenide La2O2ZnSe2
  
  Tuxworth, A. J., McCabe, E. E., Free, D. G., Clark, S. J., & Evans, J. S. (2013). Structural Characterization and Physical Properties of the New Transition Metal Oxyselenide La2O2ZnSe2. Inorganic Chemistry, 52(4), 2078-2085. https://doi.org/10.1021/ic302484x
• DFT-assisted interpretation of the Raman spectra of hydrogen-ordered ice XV
  
  Whale, T. F., Clark, S. J., Finney, J. L., & Salzmann, C. G. (2013). DFT-assisted interpretation of the Raman spectra of hydrogen-ordered ice XV. Journal of Raman Spectroscopy, 44(2), 290-298. https://doi.org/10.1002/jrs.4170
• DFT+U investigation of the catalytic properties of ferruginous clay
  
  Geatches, D. L., Clark, S. J., & Greenwell, H. C. (2013). DFT+U investigation of the catalytic properties of ferruginous clay. American Mineralogist, 98(1), 132-140. https://doi.org/10.2138/am.2013.4204
• Extraordinarily Long-Ranged Structural Relaxation in Defective Achiral Carbon Nanotubes
  
  Hunt, M., & Clark, S. (2012). Extraordinarily Long-Ranged Structural Relaxation in Defective Achiral Carbon Nanotubes. Physical Review Letters, 109(26), Article 265502. https://doi.org/10.1103/physrevlett.109.265502
• Electron spin resonance signature of the oxygen vacancy in HfO2
  
  Gillen, R., Robertson, J., & Clark, S. (2012). Electron spin resonance signature of the oxygen vacancy in HfO2. Applied Physics Letters, 101(10), Article 102904. https://doi.org/10.1063/1.4751110
• The high-pressure electronic structure of the [Ni(ptdt)2] organic molecular conductor
  
  Tulip, P., Bates, S., & Clark, S. (2012). The high-pressure electronic structure of the [Ni(ptdt)2] organic molecular conductor. Journal of Chemical Physics, 137(2), Article 024701. https://doi.org/10.1063/1.4731692
• Monomer Adsorption on Kaolinite: Modeling the Essential Ingredients
  
  Geatches, D. L., Jacquet, A., Clark, S. J., & Greenwell, H. C. (2012). Monomer Adsorption on Kaolinite: Modeling the Essential Ingredients. Journal of Physical Chemistry C, 116(42), 22365-22374. https://doi.org/10.1021/jp306371m
• Electronic and magnetic properties of Ti2O3, Cr2O3, and Fe2O3 calculated by the screened exchange hybrid density functional
  
  Guo, Y., Clark, S. J., & Robertson, J. (2012). Electronic and magnetic properties of Ti2O3, Cr2O3, and Fe2O3 calculated by the screened exchange hybrid density functional. Journal of Physics: Condensed Matter, 24(32), Article 325504. https://doi.org/10.1088/0953-8984/24/32/325504
• Iron reduction in nontronite-type clay minerals: Modelling a complex system
  
  Geatches, D., Clark, S., & Greenwell, H. (2012). Iron reduction in nontronite-type clay minerals: Modelling a complex system. Geochimica Et Cosmochimica Acta, 81, 13-27. https://doi.org/10.1016/j.gca.2011.12.013
• Optimized effective potential using the Hylleraas variational method
  
  Hollins, T., Clark, S., Refson, K., & Gidopoulos, N. (2012). Optimized effective potential using the Hylleraas variational method. Physical Review B (Condensed Matter), 85(23), Article 235126. https://doi.org/10.1103/physrevb.85.235126
• Calculation of point defects in rutile TiO2 by the screened-exchange hybrid functional
  
  Lee, H.-Y., Clark, S. J., & Robertson, J. (2012). Calculation of point defects in rutile TiO2 by the screened-exchange hybrid functional. Physical Review B (Condensed Matter), 86(7), Article 075209. https://doi.org/10.1103/physrevb.86.075209
• Advances in understanding of transparent conducting oxides
  
  Robertson, J., Gillen, R., & Clark, S. (2012). Advances in understanding of transparent conducting oxides. Thin Solid Films, 520(10, SI), 3714-3720. https://doi.org/10.1016/j.tsf.2011.10.063
• Computation of magnetic shielding to simultaneously validate a crystal structure and assign a solid-state NMR spectrum
  
  Apperley, D. C., Batsanov, A. S., Clark, S. J., Harris, R. K., Hodgkinson, P., & Jochym, D. B. (2012). Computation of magnetic shielding to simultaneously validate a crystal structure and assign a solid-state NMR spectrum. Journal of Molecular Structure, 1015, 192-201. https://doi.org/10.1016/j.molstruc.2011.10.024
• Shifting Schottky barrier heights with ultra-thin dielectric layers
  
  Lin, L., Robertson, J., & Clark, S. (2011). Shifting Schottky barrier heights with ultra-thin dielectric layers. Microelectronic Engineering, 88(7), 1461-1463. https://doi.org/10.1016/j.mee.2011.03.049
• On the identification of the oxygen vacancy in HfO(2)
  
  Clark, S., Lin, L., & Robertson, J. (2011). On the identification of the oxygen vacancy in HfO(2). Microelectronic Engineering, 88(7), 1464-1466. https://doi.org/10.1016/j.mee.2011.03.078
• Characterisation of the GAG-binding properties of complement factor H, an immune regulator associated with AMD
  
  Clark, S., Herbert, A., Uhrin, D., Hakobyan, S., Morgan, B., Bishop, P., & Day, A. (2011). Characterisation of the GAG-binding properties of complement factor H, an immune regulator associated with AMD. International Journal of Experimental Pathology, 92(3), A37-A38.
• Ab initio transition state searching in complex systems: Fatty acid decarboxylation in minerals
  
  Geatches, D., Greenwell, H., & Clark, S. (2011). Ab initio transition state searching in complex systems: Fatty acid decarboxylation in minerals. The Journal of Physical Chemistry A, 115(12), 2658-2667. https://doi.org/10.1021/jp200106x
• Calculation of semiconductor band structures and defects by the screened exchange density functional
  
  Clark, S., & Robertson, J. (2011). Calculation of semiconductor band structures and defects by the screened exchange density functional. Physica Status Solidi (b), 248(3), 537-546. https://doi.org/10.1002/pssb.201046110
• Calculation of infrared and Raman vibration modes of magnesite at high pressure by density-functional perturbation theory and comparison with experiments
  
  Clark, S. J., Jouanna, P., Haines, J., & Mainprice, D. (2011). Calculation of infrared and Raman vibration modes of magnesite at high pressure by density-functional perturbation theory and comparison with experiments. Physics and Chemistry of Minerals, 38(3), 193-202. https://doi.org/10.1007/s00269-010-0395-y
• Limits to doping in oxides
  
  Robertson, J., & Clark, S. (2011). Limits to doping in oxides. Physical Review B: Condensed Matter and Materials Physics, 83(7), Article 075205. https://doi.org/10.1103/physrevb.83.075205
• Understanding the optical spectroscopy of amphiphilic molecular rectifiers: A density functional approach
  
  Tan, O., Clark, S., Szablewski, M., & Cross, G. (2010). Understanding the optical spectroscopy of amphiphilic molecular rectifiers: A density functional approach. Journal of Chemical Physics, 133(24), Article 244702. https://doi.org/10.1063/1.3516177
• ELECTRONIC, MECHANICAL AND OPTICAL PROPERTIES OF Si(3)P(4) AND Ge(3)P(4): AN AB INITIO STUDY
  
  Khan, G. G., Clark, S., & Bandyopadhyay, N. (2010). ELECTRONIC, MECHANICAL AND OPTICAL PROPERTIES OF Si(3)P(4) AND Ge(3)P(4): AN AB INITIO STUDY. International Journal of Modern Physics B, 24(28), 5487-5494. https://doi.org/10.1142/s0217979210055354
• Role of Clay Minerals in Oil-Forming Reactions
  
  Geatches, D. L., Clark, S. J., & Greenwell, H. C. (2010). Role of Clay Minerals in Oil-Forming Reactions. The Journal of Physical Chemistry A, 114(10), 3569-3575. https://doi.org/10.1021/jp9096869
• Intrinsic defects in ZnO calculated by screened exchange and hybrid density functionals
  
  Clark, S., Robertson, J., Lany, S., & Zunger, A. (2010). Intrinsic defects in ZnO calculated by screened exchange and hybrid density functionals. Physical Review B, 81(11), Article 115311. https://doi.org/10.1103/physrevb.81.115311
• Oxygen vacancy levels and electron transport in Al(2)O(3)
  
  Liu, D., Clark, S., & Robertson, J. (2010). Oxygen vacancy levels and electron transport in Al(2)O(3). Applied Physics Letters, 96(3), Article 032905. https://doi.org/10.1063/1.3293440
• Electron and vibrational spectroscopies using DFT, plane waves and pseudopotentials: CASTEP implementation
  
  Milman, V., Refson, K., Clark, S., Pickard, C., Yates, J., Gao, S. .-P., Hasnip, P., Probert, M., Perlov, A., & Segall, M. (2010). Electron and vibrational spectroscopies using DFT, plane waves and pseudopotentials: CASTEP implementation. Journal of Molecular Structure: THEOCHEM, 954(1-3, SI), 22-35. https://doi.org/10.1016/j.theochem.2009.12.040
• Screened exchange density functional applied to solids
  
  Clark, S. J., & Robertson, J. (2010). Screened exchange density functional applied to solids. Physical Review B, 82(8), Article 085208. https://doi.org/10.1103/physrevb.82.085208
• Evidence for hydrogen transport in deuterated LiBH(4) from low-temperature Raman-scattering measurements and first-principles calculations
  
  Gremaud, R., Lodziana, Z., Hug, P., Willenberg, B., Racu, A.-M., Schoenes, J., Ramirez-Cuesta, A., Clark, S., Refson, K., Zuettel, A., & Borgschulte, A. (2009). Evidence for hydrogen transport in deuterated LiBH(4) from low-temperature Raman-scattering measurements and first-principles calculations. Physical Review B (Condensed Matter), 80(10), Article 100301. https://doi.org/10.1103/physrevb.80.100301
• Energy levels of oxygen vacancies in BiFeO(3) by screened exchange
  
  Clark, S., & Robertson, J. (2009). Energy levels of oxygen vacancies in BiFeO(3) by screened exchange. Applied Physics Letters, 94(2), Article 022902. https://doi.org/10.1063/1.3070532
• Structural, electronic and vibrational properties of tetragonal zirconia under pressure: a density functional theory study
  
  Milman, V., Perlov, A., Refson, K., Clark, S. J., Gavartin, J., & Winkler, B. (2009). Structural, electronic and vibrational properties of tetragonal zirconia under pressure: a density functional theory study. Journal of Physics: Condensed Matter, 21(48), Article 485404. https://doi.org/10.1088/0953-8984/21/48/485404
• The Complex Excited-state Behavior of a Polyspirobifluorene Derivative: The Role of Spiroconjugation and Mixed Charge Transfer Character on Excited-state Stabilization and Radiative Lifetime
  
  Hintschich, S. I., Rothe, C., King, S. M., Clark, S. J., & Monkman, A. P. (2008). The Complex Excited-state Behavior of a Polyspirobifluorene Derivative: The Role of Spiroconjugation and Mixed Charge Transfer Character on Excited-state Stabilization and Radiative Lifetime. Journal of Physical Chemistry B (Soft Condensed Matter and Biophysical Chemistry), 112(51), 16300-16306. https://doi.org/10.1021/jp8044884
• β phase and γ-β metal-insulator transition in multiferroic BiFeO3
  
  Palai, R., Katiyar, R., Schmid, H., Tissot, P., Clark, S., Robertson, J., Redfern, S., Catalan, G., & Scott, J. (2008). β phase and γ-β metal-insulator transition in multiferroic BiFeO3. Physical Review B, 77(1), Article 014110. https://doi.org/10.1103/physrevb.77.014110
• Electronic defects in LaAlO3
  
  Xiong, K., Robertson, J., & Clark, S. (2008). Electronic defects in LaAlO3. Microelectronic Engineering, 85(1, SI), 65-69. https://doi.org/10.1016/j.mee.2007.01.181
• Moving AHEAD with an international human epigenome project
  
  Jones, P. A., Archer, T. K., Baylin, S. B., Beck, S., Berger, S., Bernstein, B. E., Carpten, J. D., Clark, S. J., Costello, J. F., Doerge, R. W., Esteller, M., Feinberg, A. P., Gingeras, T. R., Greally, J. M., Henikoff, S., Herman, J. G., Jackson-Grusby, L., Jenuwein, T., Jirtle, R. L., … Excellence, E. U. N. (2008). Moving AHEAD with an international human epigenome project. Nature, 454(7205), 711-715. https://doi.org/10.1038/454711a
• Using O-17 solid-state NMR and first principles calculation to characterise structure and dynamics in inorganic framework materials
  
  Soleilhavoup, A., Hampson, M. R., Clark, S. J., Evans, J. S., & Hodgkinson, P. (2007). Using O-17 solid-state NMR and first principles calculation to characterise structure and dynamics in inorganic framework materials. Magnetic Resonance in Chemistry, 45(S), S144-S155. https://doi.org/10.1002/mrc.2128
• Behavior of hydrogen in wide band gap oxides
  
  Xiong, K., Robertson, J., & Clark, S. (2007). Behavior of hydrogen in wide band gap oxides. Journal of Applied Physics, 102(8), Article 083710. https://doi.org/10.1063/1.2798910
• Exchange-correlation holes in metal surfaces using nonlocal density-functional theory
  
  Jochym, D. B., & Clark, S. J. (2007). Exchange-correlation holes in metal surfaces using nonlocal density-functional theory. Physical Review B (Condensed Matter), 76(7), Article 075411. https://doi.org/10.1103/physrevb.76.075411
• Band gap and Schottky barrier heights of multiferroic BiFeO3
  
  Clark, S., & Robertson, J. (2007). Band gap and Schottky barrier heights of multiferroic BiFeO3. Applied Physics Letters, 90(13), Article 132903. https://doi.org/10.1063/1.2716868
• Non-local density functional description of poly-para-phenylene vinylene
  
  Zheng, G., Clark, S., Brand, S., & Abram, R. (2007). Non-local density functional description of poly-para-phenylene vinylene. Chinese Physics Letters, 24(3), 807-810. https://doi.org/10.1088/0256-307x/24/3/061
• Preschool vision screening by family physicians
  
  Kemper, A. R., & Clark, S. J. (2007). Preschool vision screening by family physicians. Journal of Pediatric Ophthalmology and Strabismus, 44(1), 24-27.
• Combining insights from solid-state NMR and first principles calculation: applications to the ¹⁹F NMR of octafluoronaphthalene
  
  Robbins, A., Ng, W., Jochym, D., Keal, T., Clark, S., Tozer, D., & Hodgkinson, P. (2007). Combining insights from solid-state NMR and first principles calculation: applications to the ¹⁹F NMR of octafluoronaphthalene. Physical Chemistry Chemical Physics, 9(19), 2389-2396. https://doi.org/10.1039/b701291h
• Influence of the R-substituents on the properties of [Ni(R(2)pipdt)(dmit)] complexes and crystal structure where R = CH2C6H5
  
  Geary, E. A., Yellowlees, L. J., Parsons, S., Pilia, L., Serpe, A., Mercuri, M. L., Deplano, P., Clark, S. J., & Robertson, N. (2007). Influence of the R-substituents on the properties of [Ni(R(2)pipdt)(dmit)] complexes and crystal structure where R = CH2C6H5. Dalton Transactions, 46, 5453-5459. https://doi.org/10.1039/b712243h
• Concordant epigenetic silencing of transforming growth factor-beta signaling pathway genes occurs early in breast carcinogenesis
  
  Hinshelwood, R. A., Huschtscha, L. I., Melki, J., Stirzaker, C., Abdipranoto, A., Vissel, B., Ravasi, T., Wells, C. A., Hume, D. A., Reddel, R. R., & Clark, S. J. (2007). Concordant epigenetic silencing of transforming growth factor-beta signaling pathway genes occurs early in breast carcinogenesis. Cancer Research, 67(24), 11517-11527. https://doi.org/10.1158/0008-5472.can-07-1284
• Precise ab-initio prediction of terahertz vibrational modes in crystalline systems
  
  Jepsen, P. U., & Clark, S. J. (2007). Precise ab-initio prediction of terahertz vibrational modes in crystalline systems. Chemical Physics Letters, 442(4-6), 275-280. https://doi.org/10.1016/j.cplett.2007.05.112
• Threshold of evaluation for short stature in a pediatric endocrine clinic: Differences between boys versus girls?
  
  Lee, J. M., Davis, M. M., Clark, S. J., & Kemper, A. R. (2007). Threshold of evaluation for short stature in a pediatric endocrine clinic: Differences between boys versus girls?. JOURNAL OF PEDIATRIC ENDOCRINOLOGY \& METABOLISM, 20(1), 21-26.
• Primary care physicians' attitudes regarding follow-up care for children with positive newborn screening results
  
  Kemper, A. R., Uren, R. L., Moseley, K. L., & Clark, S. J. (2006). Primary care physicians’ attitudes regarding follow-up care for children with positive newborn screening results. Pediatrics, 118(5), 1836-1841. https://doi.org/10.1542/peds.2006-1639
• Condensed phase ionic polarizabilities from plane wave density functional theory calculations
  
  Heaton, R. J., Madden, P. A., Clark, S. J., & Jahn, S. (2006). Condensed phase ionic polarizabilities from plane wave density functional theory calculations. Journal of Chemical Physics, 125(14), Article 144104. https://doi.org/10.1063/1.2357151
• Barriers to follow-up eye care after preschool vision screening in the primary care setting: Findings from a pilot study
  
  Kemper, A. R., Uren, R. L., & Clark, S. J. (2006). Barriers to follow-up eye care after preschool vision screening in the primary care setting: Findings from a pilot study. Journal of AAPOS, 10(5), 476-478. https://doi.org/10.1016/j.jaapos.2006.07.009
• Lattice dynamics of polyaniline and poly(p-pyridyl vinyline): First-principles determination
  
  Zheng, G., Clark, S., Brand, S., & Abram, R. (2006). Lattice dynamics of polyaniline and poly(p-pyridyl vinyline): First-principles determination. Physical Review B, 74(16). https://doi.org/10.1103/physrevb.74.165210
• Lattice dynamical and dielectric properties of L-amino acids
  
  Tulip, P., & Clark, S. (2006). Lattice dynamical and dielectric properties of L-amino acids. Physical Review B (Condensed Matter), 74(6), Article 064301. https://doi.org/10.1103/physrevb.74.064301
• Hexamer formation in tertiary butyl alcohol (2-methyl-2-propanol, C4H10O)
  
  McGregor, P. A., Allan, D. R., Parsons, S., & Clark, S. J. (2006). Hexamer formation in tertiary butyl alcohol (2-methyl-2-propanol, C4H10O). Acta Crystallographica. Section B, Structural Science., 62(Part 4), 599-605. https://doi.org/10.1107/s0108768106015424
• Defect states in the high-dielectric-constant gate oxide LaAlO3
  
  Xiong, K., Robertson, J., & Clark, S. (2006). Defect states in the high-dielectric-constant gate oxide LaAlO3. Applied Physics Letters, 89(2), Article 022907. https://doi.org/10.1063/1.2221521
• Adoption of electronic health records in primary care pediatric practices
  
  Kemper, A., Uren, R., & Clark, S. (2006). Adoption of electronic health records in primary care pediatric practices. Pediatrics, 118(1), E20-E24. https://doi.org/10.1542/peds.2005-3000
• Defect energy states in high-K gate oxides
  
  Xiong, K., Robertson, J., & Clark, S. (2006). Defect energy states in high-K gate oxides. Physica Status Solidi (b), 243(9), 2071-2080. https://doi.org/10.1002/pssb.200666803
• Band structure of functional oxides by screened exchange and the weighted density approximation
  
  Robertson, J., Xiong, K., & Clark, S. (2006). Band structure of functional oxides by screened exchange and the weighted density approximation. Physica Status Solidi (b), 243(9), 2054-2070. https://doi.org/10.1002/pssb.200666802
• Molecular dynamics calculations of the thermal expansion properties and melting points of Si and Ge
  
  Timon, V., Brand, S., Clark, S., & Abram, R. (2006). Molecular dynamics calculations of the thermal expansion properties and melting points of Si and Ge. Journal of Physics: Condensed Matter, 18(13), 3489-3498. https://doi.org/10.1088/0953-8984/18/13/016
• High-pressure polymorphism in L-cysteine: the crystal structures of L-cysteine-III and L-cysteine-IV
  
  Moggach, S., Allan, D., Clark, S., Gutmann, M., Parsons, S., Pulham, C., & Sawyer, L. (2006). High-pressure polymorphism in L-cysteine: the crystal structures of L-cysteine-III and L-cysteine-IV. Acta Crystallographica. Section B, Structural Science., 62(Part 2), 296-309. https://doi.org/10.1107/s0108768105038802
• Variational density-functional perturbation theory for dielectrics and lattice dynamics
  
  Refson, K., Tulip, P., & Clark, S. (2006). Variational density-functional perturbation theory for dielectrics and lattice dynamics. Physical Review B - Condensed Matter and Materials Physics, 73(15), Article 155114. https://doi.org/10.1103/physrevb.73.155114
• Screened-exchange stress tensor in density functional theory
  
  Gibson, M., Brand, S., & Clark, S. (2006). Screened-exchange stress tensor in density functional theory. Physical Review B (Condensed Matter), 73(12), Article 125120. https://doi.org/10.1103/physrevb.73.125120
• Matrix dependence of blue light emission from a novel NH2-functionalized dicyanoquinodimethane derivative
  
  Szablewski, M., Bloor, D., Kagawa, Y., Mosurkal, R., Cole, J., Clark, S., Cross, G., & Palsson, L. (2006). Matrix dependence of blue light emission from a novel NH2-functionalized dicyanoquinodimethane derivative. Journal of Physical Organic Chemistry, 19(3), 206-213. https://doi.org/10.1002/poc.1020
• Passivation of oxygen vacancy states in HfO2 by nitrogen
  
  Xiong, K., Robertson, J., & Clark, S. (2006). Passivation of oxygen vacancy states in HfO2 by nitrogen. Journal of Applied Physics, 99(4), Article 044105. https://doi.org/10.1063/1.2173688
• Weed seed resources for birds in fields with contrasting conventional and genetically modified herbicide-tolerant crops
  
  Gibbons, D. W., Bohan, D. A., Rothery, P., Stuart, R. C., Haughton, A. J., Scott, R. J., Wilson, J. D., Perry, J. N., Clark, S. J., Dawson, R. J., & Firbank, L. G. (2006). Weed seed resources for birds in fields with contrasting conventional and genetically modified herbicide-tolerant crops. Proceedings of the Royal Society B: Biological Sciences, 273(1596), 1921-1928. https://doi.org/10.1098/rspb.2006.3522
• Band gaps and defect levels in functional oxides
  
  Robertson, J., Xiong, K., & Clark, S. (2006). Band gaps and defect levels in functional oxides. Thin Solid Films, 496(1), 1-7. https://doi.org/10.1016/j.tsf.2005.08.175
• Defect energy levels in HfO2 high-dielectric-constant gate oxide
  
  Xiong, K., Robertson, J., Gibson, M., & Clark, S. (2005). Defect energy levels in HfO2 high-dielectric-constant gate oxide. Applied Physics Letters, 87(18), Article 183505. https://doi.org/10.1063/1.2119425
• L-cysteine-I at 30 K
  
  Moggach, S., Clark, S., & Parsons, S. (2005). L-cysteine-I at 30 K. Acta Crystallographica. Section E, Structure Reports Online., 61(Part 8), O2739-O2742. https://doi.org/10.1107/s1600536805023688
• Ab initio dynamics study of poly-para-phenylene vinylene
  
  Zheng, G., Clark, S., Tulip, P., Brand, S., & Abram, R. (2005). Ab initio dynamics study of poly-para-phenylene vinylene. Journal of Chemical Physics, 123(2), Article 024904. https://doi.org/10.1063/1.1955516
• First-principles calculations of 2x2 reconstructions of GaN(0001) surfaces involving N, Al, Ga, In, and as atoms
  
  Timon, V., Brand, S., Clark, S., Gibson, M., & Abram, R. (2005). First-principles calculations of 2x2 reconstructions of GaN(0001) surfaces involving N, Al, Ga, In, and as atoms. Physical Review B, 72(3). https://doi.org/10.1103/physrevb.72.035327
• Observation of magnetic excitons in LaCoO 3
  
  Giblin, S., Terry, I., Clark, S., Prokscha, T., Prabhakaran, D., Boothroyd, A., Wu, J., & Leighton, C. (2005). Observation of magnetic excitons in LaCoO 3. Europhysics Letters, 70(5), 677-683. https://doi.org/10.1209/epl/i2004-10519-4
• Structural and electronic properties of L-amino acids
  
  Tulip, P., & Clark, S. (2005). Structural and electronic properties of L-amino acids. Physical Review B (Condensed Matter), 71(19), Article 195117. https://doi.org/10.1103/physrevb.71.195117
• Theoretical adlayer surface morphology of wurtzite 2 × 2 reconstructions of the GaN (0001) surface
  
  Timon, V., Brand, S., Clark, S., & Abram, R. (2005). Theoretical adlayer surface morphology of wurtzite 2 × 2 reconstructions of the GaN (0001) surface. Journal of Physics: Condensed Matter, 17(1), 17-26. https://doi.org/10.1088/0953-8984/17/1/002
• [BDTA](2)[Cu(mnt)(2)]: An almost perfect one-dimensional magnetic material
  
  Staniland, S., Fujita, W., Umezono, Y., Awaga, K., Camp, P., Clark, S., & Robertson, N. (2005). [BDTA](2)[Cu(mnt)(2)]: An almost perfect one-dimensional magnetic material. Inorganic Chemistry, 44(3), 546-551. https://doi.org/10.1021/ic04879%2B
• A unique new multiband molecular conductor: [BDTA][Ni(dmit)(2)](2)
  
  Staniland, S., Fujita, W., Umezono, Y., Awaga, K., Clark, S., Cui, H., Kobayashi, H., & Robertson, N. (2005). A unique new multiband molecular conductor: [BDTA][Ni(dmit)(2)](2). Chemical Communications, 25, 3204-3206. https://doi.org/10.1039/b502783g
• First principles methods using CASTEP
  
  Clark, S., Segall, M., Pickard, C., Hasnip, P., Probert, M., Refson, K., & Payne, M. (2005). First principles methods using CASTEP. Zeitschrift für Kristallographie - Crystalline Materials, 220(5-6), 567-570. https://doi.org/10.1524/zkri.220.5.567.65075
• Effect of high pressure on the crystal structures of polymorphs of glycine
  
  Dawson, A., Allan, D., Belmonte, S., Clark, S., David, W., McGregor, P., Parsons, S., Pulham, C., & Sawyer, L. (2005). Effect of high pressure on the crystal structures of polymorphs of glycine. CRYSTAL GROWTH \& DESIGN, 5(4), 1415-1427. https://doi.org/10.1021/cg049716m
• An ab initio study of observed and hypothetical polymorphs of glycine
  
  Chisholm, J., Motherwell, S., Tulip, P., Parsons, S., & Clark, S. (2005). An ab initio study of observed and hypothetical polymorphs of glycine. CRYSTAL GROWTH \& DESIGN, 5(4), 1437-1442. https://doi.org/10.1021/cg0496235
• Band gap modification of single-walled carbon nanotube and boron nitride nanotube under a transverse electric field
  
  Chen, C., Lee, M., & Clark, S. (2004). Band gap modification of single-walled carbon nanotube and boron nitride nanotube under a transverse electric field. Nanotechnology, 15(12), 1837-1843. https://doi.org/10.1088/0957-4484/15/12/025
• First-principles studies of the structural and electronic properties of poly-para-phenylene vinylene
  
  Zheng, G., Clark, S., Brand, S., & Abram, R. (2004). First-principles studies of the structural and electronic properties of poly-para-phenylene vinylene. Journal of Physics: Condensed Matter, 16(47), 8609-8620. https://doi.org/10.1088/0953-8984/16/47/013
• Ab initio calculations of the structural and electronic properties of HgmTen clusters
  
  Wang, X., Clark, S., & Abram, R. (2004). Ab initio calculations of the structural and electronic properties of HgmTen clusters. Physical Review B, 70(23). https://doi.org/10.1103/physrevb.70.235328
• Calculation of flexoelectric coefficients for a nematic liquid crystal by atomistic simulation
  
  Cheung, D., Clark, S., & Wilson, M. (2004). Calculation of flexoelectric coefficients for a nematic liquid crystal by atomistic simulation. Journal of Chemical Physics, 121(18), 9131-9139. https://doi.org/10.1063/1.1802231
• Dielectric and vibrational properties of amino acids
  
  Tulip, P., & Clark, S. (2004). Dielectric and vibrational properties of amino acids. Journal of Chemical Physics, 121(11), 5201-5210. https://doi.org/10.1063/1.1781615
• Ab initio studies of strained wurtzite GaN surfaces
  
  Timon, V., Brand, S., Clark, S., & Abram, R. (2004). Ab initio studies of strained wurtzite GaN surfaces. Journal of Physics: Condensed Matter, 16(4), 531-542. https://doi.org/10.1088/0953-8984/16/4/002
• Arene-perfluoroarene interactions in crystal engineering: structural preferences in polyfluorinated tolans
  
  Smith, C., Smith, P., Thomas, R., Robins, E., Collings, J., Dai, C., Scott, A., Borwick, S., Batsanov, A., Watt, S., Clark, S., Viney, C., Howard, J., Clegg, W., & Marder, T. (2004). Arene-perfluoroarene interactions in crystal engineering: structural preferences in polyfluorinated tolans. Journal of Materials Chemistry, 14(3), 413-420. https://doi.org/10.1039/b314094f
• Gas molecule effects on field emission properties of single-walled carbon nanotube
  
  Chen, C., Lee, M., & Clark, S. (2004). Gas molecule effects on field emission properties of single-walled carbon nanotube. Diamond and Related Materials, 13(4-8), 1306-1313. https://doi.org/10.1016/j.diamond.2003.11.081
• Investigation on exchange and correlation holes in a strongly confined electron gas
  
  Clark, S., & Rushton, P. (2004). Investigation on exchange and correlation holes in a strongly confined electron gas. Journal of Physics: Condensed Matter, 16(28), 4833-4844. https://doi.org/10.1088/0953-8984/16/28/006
• Field penetration induced charge redistribution effects on the field emission properties of carbon nanotubes - a first-principle study
  
  Chen, C., Lee, M., & Clark, S. (2004). Field penetration induced charge redistribution effects on the field emission properties of carbon nanotubes - a first-principle study. Applied Surface Science, 228(1-4), 143-150. https://doi.org/10.1016/j.apsusc.2004.01.004
• Pressure-induced polymorphism in phenol
  
  Allan, D., Clark, S., Dawson, A., McGregor, P., & Parsons, S. (2002). Pressure-induced polymorphism in phenol. Acta Crystallographica. Section B, Structural Science., 58(Part 6), 1018-1024. https://doi.org/10.1107/s0108768102018797
• Arene-perfluoroarene interactions in crystal engineering 8: structures of 1 : 1 complexes of hexafluorobenzene with fused-ring polyaromatic hydrocarbons
  
  Collings, J., Roscoe, K., Robins, E., Batsanov, A., Stimson, L., Howard, J., Clark, S., & Marder, T. (2002). Arene-perfluoroarene interactions in crystal engineering 8: structures of 1 : 1 complexes of hexafluorobenzene with fused-ring polyaromatic hydrocarbons. New Journal of Chemistry, 26(12), 1740-1746. https://doi.org/10.1039/b207102a
• Parametrization and validation of a force field for liquid-crystal forming molecules
  
  Cheung, D., Clark, S., & Wilson, M. (2002). Parametrization and validation of a force field for liquid-crystal forming molecules. Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 65(5, Part 1), Article 051709. https://doi.org/10.1103/physreve.65.051709
• Calculation of the rotational viscosity of a nematic liquid crystal.
  
  Cheung, D., Clark, S., & Wilson, M. (2002). Calculation of the rotational viscosity of a nematic liquid crystal. Chemical Physics Letters, 356(1-2), 140-146. https://doi.org/10.1016/s0009-2614%2802%2900380-9
• Nonlocal density-functional description of exchange and correlation in silicon
  
  Rushton, P., Tozer, D., & Clark, S. (2002). Nonlocal density-functional description of exchange and correlation in silicon. Physical Review B, 65(23), Article 235203. https://doi.org/10.1103/physrevb.65.235203
• Comparison of the high-pressure and low-temperature structures of sulfuric acid
  
  Allan, D., Clark, S., Dawson, A., McGregor, P., & Parsons, S. (2002). Comparison of the high-pressure and low-temperature structures of sulfuric acid. Dalton Transactions, 8, 1867-1871. https://doi.org/10.1039/b109395a
• Description of exchange and correlation in the strongly inhomogeneous electron gas using a nonlocal density functional
  
  Rushton, P., Tozer, D., & Clark, S. (2002). Description of exchange and correlation in the strongly inhomogeneous electron gas using a nonlocal density functional. Physical Review B, 65(19), Article 193106. https://doi.org/10.1103/physrevb.65.193106
• First-principles simulation: ideas, illustrations and the CASTEP code
  
  Segall, M., Lindan, P., Probert, M., Pickard, C., Hasnip, P., Clark, S., & Payne, M. (2002). First-principles simulation: ideas, illustrations and the CASTEP code. Journal of Physics: Condensed Matter, 14(11), 2717-2744. https://doi.org/10.1088/0953-8984/14/11/301
• Matrix dependence of light emission from TCNQ adducts
  
  Bloor, D., Kagawa, Y., Szablewski, M., Ravi, M., Clark, S., Cross, G., Palsson, L.-O., Beeby, A., Parmer, C., & Rumbles, G. (2001). Matrix dependence of light emission from TCNQ adducts. Journal of Materials Chemistry, 11(12), 3053-3062. https://doi.org/10.1039/b104992p
• Ab initio molecular dynamics of liquid carbon disulphide
  
  Ackland, G., & Clark, S. (2001). Ab initio molecular dynamics of liquid carbon disulphide. Molecular Physics, 99(10), 855-863. https://doi.org/10.1080/00268970010018413
• Density-functional calculations of semiconductor properties using a semiempirical exchange-correlation functional
  
  Rushton, P., Clark, S., & Tozer, D. (2001). Density-functional calculations of semiconductor properties using a semiempirical exchange-correlation functional. Physical Review B, 63(11), Article 115206. https://doi.org/10.1103/physrevb.63.115206
• Valence-band offset of the lattice-matched beta-FeSi2(100)/Si(001) heterostructure
  
  Al-Allak, H., & Clark, S. (2001). Valence-band offset of the lattice-matched beta-FeSi2(100)/Si(001) heterostructure. Physical Review B (Condensed Matter), 63(3), Article 033311. https://doi.org/10.1103/physrevb.63.033311
• Valence-band offset of the lattice-matched beta-FeSi(2)(100)/Si(001) heterostructure
  
  Al-Allak, H., & Clark, S. (2001). Valence-band offset of the lattice-matched beta-FeSi(2)(100)/Si(001) heterostructure. Physical Review B (Condensed Matter), 63(3), Article 033311.
• Interaction between metallic p orbitals and the pi orbitals of organic molecules: The binding between ethylene and aluminum
  
  King, E., Clark, S., Verdozzi, C., & Ackland, G. (2001). Interaction between metallic p orbitals and the pi orbitals of organic molecules: The binding between ethylene and aluminum. Journal of Physical Chemistry B (Soft Condensed Matter and Biophysical Chemistry), 105(3), 641-645. https://doi.org/10.1021/jp0012810
• Unique structural topologies involving metal-metal and metal-sulfur interactions: salts of [Ni(C3S5)(2)](x-) with cis-anti-cis-dicyclohexyl-18-crown-6 complexed counter ions
  
  Cronin, L., Clark, S., Parsons, S., Nakamura, T., & Robertson, N. (2001). Unique structural topologies involving metal-metal and metal-sulfur interactions: salts of [Ni(C3S5)(2)](x-) with cis-anti-cis-dicyclohexyl-18-crown-6 complexed counter ions. Dalton Transactions, 8, 1347-1351. https://doi.org/10.1039/b008299f
• Rolling-horizon lot-sizing when set-up times are sequence-dependent
  
  Clark, A., & Clark, S. (2000). Rolling-horizon lot-sizing when set-up times are sequence-dependent. International Journal of Production Research, 38(10), 2287-2307. https://doi.org/10.1080/00207540050028106
• Short-time reorientational processes in molecular fluids
  
  Clark, S., Markwick, P., Ackland, G., & Crain, J. (2000). Short-time reorientational processes in molecular fluids. Europhysics Letters, 49(1), 34-40. https://doi.org/10.1209/epl/i2000-00116-1
• A high-pressure structural study of propionic acid and the application of CCD detectors in high-pressure single-crystal x-ray diffraction
  
  Allan, D., Clark, S., Parsons, S., & Ruf, M. (2000). A high-pressure structural study of propionic acid and the application of CCD detectors in high-pressure single-crystal x-ray diffraction. Journal of Physics: Condensed Matter, 12(39), L613-L620. https://doi.org/10.1088/0953-8984/12/39/101
• Comparison of the high-pressure and low-temperature structures of ethanol and acetic acid
  
  Allan, D., & Clark, S. (1999). Comparison of the high-pressure and low-temperature structures of ethanol and acetic acid. Physical Review B, 60(9), 6328-6334. https://doi.org/10.1103/physrevb.60.6328
• Impeded dimer formation in the high-pressure crystal structure of formic acid
  
  Allan, D., & Clark, S. (1999). Impeded dimer formation in the high-pressure crystal structure of formic acid. Physical Review Letters, 82(17), 3464-3467. https://doi.org/10.1103/physrevlett.82.3464
• The influence of pressure and temperature on the crystal structure of acetone
  
  Allan, D., Clark, S., Ibberson, R., Parsons, S., Pulham, C., & Sawyer, L. (1999). The influence of pressure and temperature on the crystal structure of acetone. Chemical Communications, 8, 751-752. https://doi.org/10.1039/a900558g
• Compression mechanisms in quasimolecular XI(3) (X = As, Sb, Bi) solids
  
  Hsueh, H., Chen, R., Vass, H., Clark, S., Ackland, G., Poon, W., & Crain, J. (1998). Compression mechanisms in quasimolecular XI(3) (X = As, Sb, Bi) solids. Physical Review B, 58(22), 14812-14822. https://doi.org/10.1103/physrevb.58.14812
• Phase transitions in silicate perovskites from first principles
  
  Warren, M., Ackland, G., Karki, B., & Clark, S. (1998). Phase transitions in silicate perovskites from first principles. Mineralogical Magazine, 62(5), 585-598. https://doi.org/10.1180/002646198547981
• Structure and electronic properties of FeSi2
  
  Clark, S., Al-Allak, H., Brand, S., & Abram, R. (1998). Structure and electronic properties of FeSi2. Physical Review B, 58(16), 10389-10393. https://doi.org/10.1103/physrevb.58.10389
• Ab initio molecular polarisabilities of liquid crystals: Application to DOBAMBC and 5CB
  
  Clark, S., Ackland, G., & Crain, J. (1998). Ab initio molecular polarisabilities of liquid crystals: Application to DOBAMBC and 5CB. Europhysics Letters, 44(5), 578-584. https://doi.org/10.1209/epl/i1998-00512-5
• Structure of crystalline methanol at high pressure
  
  Allan, D., Clark, S., Brugmans, M., Ackland, G., & Vos, W. (1998). Structure of crystalline methanol at high pressure. Physical Review B (Condensed Matter), 58(18), 11809-11812.
• High-pressure semiconductor-semimetal transition in TiS2
  
  Allan, D., Kelsey, A., Clark, S., Angel, R., & Ackland, G. (1998). High-pressure semiconductor-semimetal transition in TiS2. Physical Review B, 57(9), 5106-5110. https://doi.org/10.1103/physrevb.57.5106
• Transferability of first principles derived torsional potentials for mesogenic molecules and fragments
  
  Adam, C., Clark, S., Wilson, M., Ackland, G., & Crain, J. (1998). Transferability of first principles derived torsional potentials for mesogenic molecules and fragments. Molecular Physics, 93(6), 947-954. https://doi.org/10.1080/002689798168646
• Stability and electronic structure of the cinnabar phase in GaAs
  
  Kelsey, A., Ackland, G., & Clark, S. (1998). Stability and electronic structure of the cinnabar phase in GaAs. Physical Review B, 57(4), R2029-R2032. https://doi.org/10.1103/physrevb.57.r2029
• Conformation-dependent dipoles of liquid crystal molecules and fragments from first principles
  
  Adam, C., Clark, S., Ackland, G., & Crain, J. (1997). Conformation-dependent dipoles of liquid crystal molecules and fragments from first principles. Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 55(5, Part a), 5641-5649. https://doi.org/10.1103/physreve.55.5641
• Conformational energy landscapes of liquid crystal molecules
  
  Clark, S., Adam, C., Cleaver, D., & Crain, J. (1997). Conformational energy landscapes of liquid crystal molecules. Liquid Crystals, 22(4), 477-482. https://doi.org/10.1080/026782997209207
• Properties of liquid crystal molecules from first principles computer simulation
  
  Clark, S., Adam, C., Ackland, G., White, J., & Crain, J. (1997). Properties of liquid crystal molecules from first principles computer simulation. Liquid Crystals, 22(4), 469-475. https://doi.org/10.1080/026782997209199
• Structure and elasticity of MgO at high pressure
  
  Karki, B., Stixrude, L., Clark, S., Warren, M., Ackland, G., & Crain, J. (1997). Structure and elasticity of MgO at high pressure. American Mineralogist, 82(1-2), 51-60.
• Comparison of bonding in amorphous silicon and carbon
  
  Clark, S., Crain, J., & Ackland, G. (1997). Comparison of bonding in amorphous silicon and carbon. Physical Review B, 55(21), 14059-14062. https://doi.org/10.1103/physrevb.55.14059
• Ab initio elasticity and lattice dynamics of AgGaSe2
  
  Karki, B., Clark, S., Warren, M., Hsueh, H., Ackland, G., & Crain, J. (1997). Ab initio elasticity and lattice dynamics of AgGaSe2. Journal of Physics: Condensed Matter, 9(2), 375-380. https://doi.org/10.1088/0953-8984/9/2/005
• Elastic properties of orthorhombic MgSiO3 perovskite at lower mantle pressures
  
  Karki, B., Stixrude, L., Clark, S., Warren, M., Ackland, G., & Crain, J. (1997). Elastic properties of orthorhombic MgSiO3 perovskite at lower mantle pressures. American Mineralogist, 82(5-6), 635-638.
• Low-frequency dynamics of liquid crystals
  
  Hsueh, H., Vass, H., Pu, F., Clark, S., Poon, C., & Crain, J. (1997). Low-frequency dynamics of liquid crystals. Europhysics Letters, 38(2), 107-112. https://doi.org/10.1209/epl/i1997-00209-3
• Vibrational properties of liquid crystal molecules from ab initio computer simulation
  
  Clark, S., Adam, C., Hsueh, H., Pu, F., & Crain, J. (1997). Vibrational properties of liquid crystal molecules from ab initio computer simulation. Molecular Crystals and Liquid Crystals Science and Technology. Section A, Molecular Crystals and Liquid Crystals., 302, 433-438. https://doi.org/10.1080/10587259708041859
• Ab initio calculations of the self-interstitial in silicon
  
  Clark, S., & Ackland, G. (1997). Ab initio calculations of the self-interstitial in silicon. Physical Review B, 56(1), 47-50. https://doi.org/10.1103/physrevb.56.47
• Conformation energy surface for liquid crystal molecules from first principles: Application to 5CB
  
  Clark, S., Adam, C., Ackland, G., & Crain, J. (1997). Conformation energy surface for liquid crystal molecules from first principles: Application to 5CB. Molecular Crystals and Liquid Crystals Science and Technology. Section A, Molecular Crystals and Liquid Crystals., 299, 39-\&. https://doi.org/10.1080/10587259708041971
• Practical methods in ab initio lattice dynamics
  
  Ackland, G., Warren, M., & Clark, S. (1997). Practical methods in ab initio lattice dynamics. Journal of Physics: Condensed Matter, 9(37), 7861-7872. https://doi.org/10.1088/0953-8984/9/37/017
• Safety of vaccinations - Miss America, the media, and public health
  
  Freed, G., Katz, S., & Clark, S. (1996). Safety of vaccinations - Miss America, the media, and public health. Journal of the American Medical Association, 276(23), 1869-1872. https://doi.org/10.1001/jama.276.23.1869
• Vibrational properties of the layered semiconductor germanium sulfide under hydrostatic pressure: Theory and experiment
  
  Hsueh, H., Warren, M., Vass, H., Ackland, G., Clark, S., & Crain, J. (1996). Vibrational properties of the layered semiconductor germanium sulfide under hydrostatic pressure: Theory and experiment. Physical Review B, 53(22), 14806-14817. https://doi.org/10.1103/physrevb.53.14806
• Structure and properties of silicon XII: A complex tetrahedrally bonded phase.
  
  Piltz, R., Maclean, J., Clark, S., Ackland, G., Hatton, P., & Crain, J. (1995). Structure and properties of silicon XII: A complex tetrahedrally bonded phase. Physical Review B, 52(6), 4072-4085. https://doi.org/10.1103/physrevb.52.4072
• EXOTIC STRUCTURES OF TETRAHEDRAL SEMICONDUCTORS
  
  Crain, J., Ackland, G., & Clark, S. (1995). EXOTIC STRUCTURES OF TETRAHEDRAL SEMICONDUCTORS. Reports on Progress in Physics, 58(7), 705-754. https://doi.org/10.1088/0034-4885/58/7/001
• Breakdown of Rigid-Unit Vibrations in Layered Semiconductors under Pressure: Application to Germanium Sulfide.
  
  Hsueh, H., Vass, H., Clark, S., & Crain, J. (1995). Breakdown of Rigid-Unit Vibrations in Layered Semiconductors under Pressure: Application to Germanium Sulfide. Europhysics Letters, 31(3), 151-155. https://doi.org/10.1209/0295-5075/31/3/005
• DENSE TETRAHEDRAL STRUCTURES OF COMPOUND SEMICONDUCTOR
  
  Crain, J., Ackland, G., Piltz, R., Hatton, P., & Clark, S. (1995). DENSE TETRAHEDRAL STRUCTURES OF COMPOUND SEMICONDUCTOR. Journal of Physics and Chemistry of Solids, 56(3-4), 495-500. https://doi.org/10.1016/0022-3697%2894%2900230-4
• Theoretical stability limit of diamond at ultrahigh pressure
  
  Clark, S., Ackland, G., & Crain, J. (1995). Theoretical stability limit of diamond at ultrahigh pressure. Physical Review B, 52(21), 15035-15038. https://doi.org/10.1103/physrevb.52.15035
• BREAKDOWN OF RIGID-UNIT VIBRATIONS IN LAYERED SEMICONDUCTORS UNDER PRESSURE - APPLICATION TO GERMANIUM SULFIDE (VOL 31, PG 151, 1995)
  
  Hsueh, H., Vass, H., Clark, S., & Crain, J. (1995). BREAKDOWN OF RIGID-UNIT VIBRATIONS IN LAYERED SEMICONDUCTORS UNDER PRESSURE - APPLICATION TO GERMANIUM SULFIDE (VOL 31, PG 151, 1995). Europhysics Letters, 31(8). https://doi.org/10.1209/0295-5075/31/8/c01
• PRESSURE-INDUCED POLYMORPHISM IN CUCL - AN AB-INITIO STUDY
  
  Hsueh, H., Maclean, J., Guo, G., Lee, M., Clark, S., Ackland, G., & Crain, J. (1995). PRESSURE-INDUCED POLYMORPHISM IN CUCL - AN AB-INITIO STUDY. Physical Review B, 51(18), 12216-12222. https://doi.org/10.1103/physrevb.51.12216
• HIGH-PRESSURE EFFECTS IN THE LAYERED SEMICONDUCTOR GERMANIUM SELENIDE
  
  Hsueh, H., Vass, H., Clark, S., Ackland, G., & Crain, J. (1995). HIGH-PRESSURE EFFECTS IN THE LAYERED SEMICONDUCTOR GERMANIUM SELENIDE. Physical Review B, 51(23), 16750-16760. https://doi.org/10.1103/physrevb.51.16750
• A THEORETICAL-STUDY OF PRESSURE EFFECTS ON SELENIUM-I
  
  Clark, S., Ackland, G., & Akbarzadeh, H. (1995). A THEORETICAL-STUDY OF PRESSURE EFFECTS ON SELENIUM-I. Journal of Physics and Chemistry of Solids, 56(3-4), 329-334. https://doi.org/10.1016/0022-3697%2894%2900202-9
• Tetrahedral structures and phase transitions in III-V semiconductors.
  
  Crain, J., Piltz, R., Ackland, G., Clark, S., Payne, M., Milman, V., Lin, J., Hatton, P., & Nam, Y. (1994). Tetrahedral structures and phase transitions in III-V semiconductors. Physical Review B, 50(12), 8389-8401. https://doi.org/10.1103/physrevb.50.8389
• Theoretical study of high-density phases of covalent semiconductors. II. Empirical treatment.
  
  Clark, S., Ackland, G., & Crain, J. (1994). Theoretical study of high-density phases of covalent semiconductors. II. Empirical treatment. Physical Review B, 49(8), 5341-5352. https://doi.org/10.1103/physrevb.49.5341
• Theoretical study of high-density phases of covalent semiconductors. I. Ab initio treatment.
  
  Crain, J., Clark, S., Ackland, G., Payne, M., Milman, V., Hatton, P., & Reid, B. (1994). Theoretical study of high-density phases of covalent semiconductors. I. Ab initio treatment. Physical Review B, 49(8), 5329-5340. https://doi.org/10.1103/physrevb.49.5329
• VERY-LOW ENERGY SURFACE OF SILICON
  
  Clark, S., Ackland, G., Crain, J., & Payne, M. (1994). VERY-LOW ENERGY SURFACE OF SILICON. Physical Review B, 50(8), 5728-5731. https://doi.org/10.1103/physrevb.50.5728
• A THEORETICAL-STUDY OF SELENIUM-I UNDER HIGH-PRESSURE
  
  Akbarzadeh, H., Clark, S., & Ackland, G. (1993). A THEORETICAL-STUDY OF SELENIUM-I UNDER HIGH-PRESSURE. Journal of Physics: Condensed Matter, 5(43), 8065-8074. https://doi.org/10.1088/0953-8984/5/43/018
• VIBRATIONAL AND ELASTIC EFFECTS OF POINT-DEFECTS IN SILICON
  
  Clark, S., & Ackland, G. (1993). VIBRATIONAL AND ELASTIC EFFECTS OF POINT-DEFECTS IN SILICON. Physical Review B, 48(15), 10899-10908. https://doi.org/10.1103/physrevb.48.10899
• THE EFFECTS OF GOVERNMENT EXPENDITURE ON THE TERM STRUCTURE OF INTEREST-RATES - COMMENT
  
  Clark, S. (1985). THE EFFECTS OF GOVERNMENT EXPENDITURE ON THE TERM STRUCTURE OF INTEREST-RATES - COMMENT. Journal of Money, Credit and Banking, 17(3), 397-400. https://doi.org/10.2307/1992635