%0 Journal Article
%T AN ALTERNATIVE DERIVATION OF COHERENT-POTENTIAL APPROXIMATION FOR DISORDERED ALLOYS-TIGHT BINDING MODEL<br>无序合金中相干势近似的另一种推导——紧束缚模型
%A ZHANG ZHAO-QING
%A <br>张昭庆
%J 物理学报
%D 1982
%I 
%X The coherent-potential approximation (CPA) for both single-particle and two-particle Green's functions are rederived using locator expansion method proposed by Matsubara and Toyozawa. Instead of using self-contained cumulant expansion to treat the excluded volume effects for atoms, we use a diagrammatic method with the idea first proposed by Yonezawa. A systemmatic method is used to generate self-consistent equations for all single-site diagrams. We emphasis our treatment for two-particle Green's function which can be extended to obtain the corresponding CPA equation for electrical conductivity in liquid metals and amorphous solids.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=0E8802F30B2CEAD20665E1D183870F7E&yid=3F3D540C9B7906DE&vid=4AD960B5AD2D111A&iid=38B194292C032A66&sid=B8F8200D88DDC7D6&eid=2AC7DCCBBC26ECF8&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0