Curie temperature in the Hubbard model with alloy disorder

被引：16

作者：

Byczuk, K

Ulmke, M

机构：

[1] Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland

[2] FGAN FKIE, D-53343 Wachtberg, Germany

来源：

EUROPEAN PHYSICAL JOURNAL B | 2005年 / 45卷 / 04期

关键词：

D O I：

10.1140/epjb/e2005-00216-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetic and electric properties of the Hubbard model with binary alloy disorder are studied within the dynamical mean-field theory. A paramagnet-ferromagnet phase transition and a Mott-Hubbard metal-insulator transition are observed upon varying the alloy concentration. A disorder induced enhancement of the Curie temperature is demonstrated and explained by the effects of band splitting and subband filling.

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收藏

页码：449 / 454

页数：6

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