Kondo coupling and Curie temperature of Ga1-xMnxAs in the coherent potential approximation

被引：2
|
作者：
Feng, Sze-Shiang [1 ]
Mochena, Mogus [1 ]
机构：
[1] Florida A&M Univ, Dept Phys, Tallahassee, FL 32307 USA
来源：
PHYSICA B-CONDENSED MATTER | 2007年 / 390卷 / 1-2期
关键词：
Kondo coupling; ferromagnetism; Curie temperature; coherent potential approximation; Ga1-xMnxAs;
D O I：
10.1016/j.physb.2006.07.074
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The ferromagnetism of Ga1-xMnxAs is studied in the coherent potential approximation (CPA). In this work, we used the exact Hilbert transformation of the face-centered cubic (fcc) density of states (DOS), which is different from the usual semi-circle DOS employed in previous works. Using Weiss molecular theory, we obtained a nonlinear relation of Curie temperature with respect to Kondo coupling. Our calculated T-C agrees very well with measured values. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：79 / 83
页数：5
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