%0 Journal Article
%T First-Principles Calculations for Elastic Properties of ZnS under Pressure<br>First-Principles Calculations for Elastic Properties of ZnS undedr Pressure
%A CHEN Xiang-Rong
%A HU Cui-E
%A ZENG Zhao-Yi
%A CAI Ling-Cang
%A <br>陈向荣
%A 胡翠娥
%A 曾召益
%A 蔡灵仓
%J 中国物理快报
%D 2008
%I 
%X The pressure dependence of elastic properties of ZnS in zinc-blende (ZB) and wurtzite (WZ) structures are investigated by the generalized gradient approximation (GGA) within the plane-wave pseudopotential density functional theory (DFT). Our results are in good agreement with the availableexperimental data and other theoretical results. From the high-pressure elastic constants obtained, we find that the ZB and WZ structures of ZnS are unstable when the applied pressures are larger than 15.8GPa and 21.3GPa, respectively. The sound velocities along different directions for the two structures are also obtained. It is shown that as pressure increases, the sound velocities of the shear wave decrease, and those of all the longitudinal waves increase. An analysis has been made to reveal the anisotropy andhighly noncentral forces in ZnS.
%K 71
%K 15
%K Mb
%K 62
%K 20
%K Dc<br>ZnS
%K 弹性材料
%K 压力
%K 各向异性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=70D58D5138A62BC1D5F389991CFE62B6&yid=67289AFF6305E306&vid=C5154311167311FE&iid=38B194292C032A66&sid=941A3E905B9F2AD9&eid=0AFD076159674A31&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=27