ANALYTICALLY TRACTABLE MEAN-FIELD THEORY FOR INTERACTING ELECTRONS AT STRONG-COUPLING

被引：0
|
作者：
JANIS, V
VOLLHARDT, D
机构：
[1] Institut für Theoretische Physik C, Technische Hochschule Aachen
来源：
PHYSICA B | 1994年 / 194卷
关键词：
D O I：
10.1016/0921-4526(94)90574-6
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A mean-field theory for the Hubbard model at strong-coupling is presented. It extends the well-known, but ad hoc, alloy-analogy approximation and puts it on a firm, thermodynamically consistent basis. The magnetic ordering is studied and the mean-field phase diagram in the U - n plane is determined for T = 0. The investigation of the spectral properties away from half filling reveals a sequence of magnetic and metal-insulator transitions for increasing U.
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页码：489 / 490
页数：2
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