CLUSTER METHOD FOR THE HUBBARD-MODEL - LOCAL MOMENTS AND SHORT-RANGE CORRELATIONS

被引：9

作者：

KAMPF, AP

机构：

[1] Department of Physics, University of California, Santa Barbara

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.44.2637

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use a functional-integral representation for the Hubbard model to describe the formation of local moments and their magnetic correlations. In the absence of long-range magnetic order, the presence of well-established local moments alone is sufficient to produce a gap in the electronic spectrum. The local moments are treated within a coherent-potential approximation, and we apply an embedded-cluster method to incorporate their interactions.

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页码：2637 / 2642

页数：6

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