First-principles calculations for electronic, optical and thermodynamic properties of ZnS
Hu Cui-E(胡翠娥)a), Zeng Zhao-Yi(曾召益)a), Cheng Yan(程艳)a), Chen Xiang-Rong(陈向荣)a)b)†, and Cai Ling-Cang(蔡灵仓)c)
aSchool of Physical Science and Technology, Sichuan University, Chengdu 610064, China; bInternational Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China; cLaboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, China
Abstract The electronic, optical and thermodynamic properties of ZnS in the zinc-blende (ZB) and wurtzite (WZ) structures are investigated by using the plane-wave pseudopotential density functional theory (DFT). The results obtained are consistent with other theoretical results and the available experimental data. When the pressures are above 20.5 and 27 GPa, the ZB-ZnS and the WZ-ZnS are converted into indirect gap semiconductors, respectively. The critical point structure of the frequency-dependent complex dielectric function is investigated and analysed to identify the optical transitions. Moreover, the values of heat capacity $C_{V}$ and Debye temperature {$\varTheta$} at different pressures and different temperatures are also obtained successfully.
Received: 22 January 2008
Revised: 30 May 2008
Accepted manuscript online:
PACS:
71.15.Mb
(Density functional theory, local density approximation, gradient and other corrections)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10776022), the State
Key Program of National Natural Science of China (Grant No
60436010), and the Fund of Key Laboratory for Shockwave and
Detonation Physics
(Grant No 9140C6711010805).
Cite this article:
Hu Cui-E(胡翠娥), Zeng Zhao-Yi(曾召益), Cheng Yan(程艳), Chen Xiang-Rong(陈向荣), and Cai Ling-Cang(蔡灵仓) First-principles calculations for electronic, optical and thermodynamic properties of ZnS 2008 Chin. Phys. B 17 3867
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