ELECTRON-ELECTRON CORRELATION IN DISORDERED BINARY-ALLOYS - T-MATRIX APPROXIMATION

被引：21

作者：

DRCHAL, V

机构：

[1] Institute of Solid State Physics, Czechoslovak Academy of Sciences, 162 53 Praha 6

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1979年 / 40卷 / 05期

关键词：

D O I：

10.1016/0022-3697(79)90010-6

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dynamical electron-electron correlation in paramagnetic disordered binary alloys described by the Hubbard-type Hamiltonian is studied using the T-matrix approximation (TMA) valid for low concentration of particles ( $ ̌0.6/atom). We introduce the terminal-point approximation for the many-body quantities, which allows us to solve the random part of the problem within the single-site approximation (CPA). The one-centre version of the TMA is used in numerical calculations. Results are compared with those of the Hartree-Fock approximation, and with the model of a pair of interacting electrons in a random alloy (CPA II). © 1979.

引用

页码：393 / 403

页数：11

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