WEAK-COUPLING THEORY OF THE PERIODIC ANDERSON MODEL IN INFINITE DIMENSIONS

被引：10

作者：

HIRASHIMA, DS

MUTOU, T

机构：

[1] Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki

来源：

PHYSICA B | 1994年 / 199卷

关键词：

D O I：

10.1016/0921-4526(94)91784-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Second-order perturbation theory is applied to the periodic Anderson model in infinite dimensions. In the particle-hole symmetric case, the electron density of states (DOS) has a hybridization gap at the Fermi level at T = 0; the width DELTA of the gap decreases as the interaction U increases. It is found that DELTA-1 is roughly proportional to the mass enhancement. Furthermore, using this model, we discuss the Van Vleck susceptibility at T = 0. The Van Vleck term is found to be enhanced by the interaction in the weak coupling region.

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页码：206 / 208

页数：3

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