%0 Journal Article
%T First principles investigation of structural stability and electronic and optical properties of LiF and NaF under high pressure<br>高压下LiF和NaF的结构稳定性及其电子和光学性质的第一性原理研究
%A Li Hai-Ming
%A Wu Xiang
%A Li Jiong
%A Chen Dong-Liang
%A Chu Wang-Sheng
%A Wu Zi-Yu
%A <br>李海铭
%A 巫翔
%A 李炯
%A 陈栋梁
%A 储旺盛
%A 吴自玉
%J 物理学报
%D 2007
%I 
%X First principles calculation of LiF and NaF (NaCl phase and CsCl phase) underhigh pressure was carried out with the full potential linearized augmented plane wave plus local orbital method. It was shown that NaCl-type LiF transforms to a CsCl-type phase at about 450 GPa. Calculations of the electronic properties of LiF at high pressure compared with the energy band structural information indicate that a non-structureal transition occurs at about 53GPa, in which the direct band structure transforms to an in-direct band structure. We also calculated the complex electronic dielectric function and the static dielectric constants of LiF as functions of pressure. The results obtained for LiF are also compared with siilar data of NaF system.
%K LiF<br>压致相变
%K 从头计算
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=5C5C4CAC320956F052F264EA4160AFE8&yid=A732AF04DDA03BB3&vid=014B591DF029732F&iid=59906B3B2830C2C5&sid=FDD44A39E45D2AFE&eid=621BBF84BE3A9398&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=22