CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Mechanical and Vibrational Properties of ZnS with Wurtzite Structure: A First-Principles Study |
YU You**, CHEN Chun-Lin, ZHAO Guo-Dong, ZHENG Xiao-Lin, ZHU Xing-Hua |
College of Optoelectronic Technology, Chengdu University of Information Technology, Chengdu 610225
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Cite this article: |
YU You, CHEN Chun-Lin, ZHAO Guo-Dong et al 2014 Chin. Phys. Lett. 31 106301 |
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Abstract We perform a first-principles study of the mechanical and vibrational properties of ZnS with a wurtzite structure. The calculated elastic constants by using a pseudopotential plane-wave method agree well with the experimental data and with the previous theoretical works. Based on the elastic constants and their related parameters, the crystal mechanical stability is discussed. Calculations of the zone-center optical-mode frequencies including longitudinal-optical/transverse-optical splitting, by using the density functional perturbation theory, are reported. All optical modes are identified, especially B1 modes, and agree with Raman measurements.
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Published: 31 October 2014
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PACS: |
63.20.dk
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(First-principles theory)
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62.20.D-
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(Elasticity)
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63.20.D-
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(Phonon states and bands, normal modes, and phonon dispersion)
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