NEW PHASES IN A SPIN-1/2 FALICOV-KIMBALL MODEL

被引：29

作者：

BRANDT, U

FLEDDERJOHANN, A

HULSENBECK, G

机构：

[1] Institut für Physik, Universität Dortmund, Dortmund 50, D-4600, Otto-Hahn-Strase

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1990年 / 81卷 / 03期

关键词：

D O I：

10.1007/BF01390822

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this investigation we present exact results on the spin-1/2 Falicov-Kimball model. We obtain ground-state results for arbitrary dimensions using the method of in-equalities as well as results on the thermodynamics for large dimensions. As a new feature (not possible in a spinless model) we obtain a transition (which may be discontinuous) into a new state with a high density of pairs of the f-electrons. © 1990 Springer-Verlag.

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页码：409 / 416

页数：8

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