液态金属及非晶态中的电导率——相干势近似

本文在紧束缚模型内得到了液态金属和非晶态中电子电导率的相干势近似(CPA)结果,用文献4]提出的处理单格点图形的系统方法可以得到平均双粒子格林函数的近似方程,这里采用具有短程序的点阵-气体模型,液态金属和非晶态金属相对应的CPA方程可以从点阵-气体模型的极限求得,这样得到的目洽方程包括所有的单格点图形,具有CPA的所有性质。 关键词：

ELECTRICAL CONDUCTIVITY OF LIQUID METALS AND AMORPHOUS SOLIDS-COHERENT-POTENTIAL APPROXIMATION

A tight-binding model is used to obtain the electrical conductivity for liquid metals and amorphous solids within the framework of coherent-potential approximation. Following the method developed in our previous paper, the approximated equations for averaged two-particle Green's function of a lattice-gas model are obtained with short-range order for atoms included. The corresponding equations for liquid metals and amorphous solids are reduced by taking the limit of the lattice-gas model. Since the self-consistent equations so obtained contain all single-site diagrams, they have all the properties of the coherent-potential approximation.