SYSTEMATIC 1/D CORRECTIONS TO THE INFINITE-DIMENSIONAL LIMIT OF CORRELATED LATTICE ELECTRON MODELS

被引：68

作者：

SCHILLER, A ^{[1
]}

INGERSENT, K ^{[1
]}

机构：

[1] NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL 32306

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.75.113

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a self-consistent treatment of Hubbard-like lattice models at large, but finite, spatial dimensions d. This involves a systematic expansion in powers of 1/d about the limit d=. The first-order corrections can be obtained by self-consistent solution of coupled one- and two-impurity models. We calculate the leading corrections to properties of the Falicov-Kimball model. The infinite-dimensional limit seems to describe this particular model remarkably well even for d=2. © 1995 The American Physical Society.

引用

页码：113 / 116

页数：4

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