Anisotropic exchange coupling in diluted magnetic semiconductors: Ab initio spin-density functional theory

被引：142

作者：

Ebert, H. ^{[1
]}

Mankovsky, S. ^{[1
]}

机构：

[1] Univ Munich, Dept Chem & Biochem Phys Chem, D-81377 Munich, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 04期

关键词：

ab initio calculations; chromium alloys; density functional theory; exchange interactions (electron); ferromagnetic materials; gallium arsenide; gallium compounds; III-V semiconductors; magnetic moments; manganese compounds; semimagnetic semiconductors; tellurium alloys; CURIE-TEMPERATURE; GA1-XMNXAS; FERROMAGNETISM; DYNAMICS;

D O I：

10.1103/PhysRevB.79.045209

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A different scheme to calculate the exchange tensor J_(ij) describing in a phenomenological way the anisotropic exchange coupling of two moments in a magnetically ordered system is presented. The ab initio approach is based on spin-polarized relativistic multiple-scattering theory within the framework of spin-density functional theory. The scheme is applied to ferromagnetic CrTe as well as the diluted magnetic semiconductor system Ga(1-x)Mn(x)As. In the latter case the results show that there is a noticeable anisotropy in the exchange coupling present, although not as pronounced as those suggested in recent theoretical investigations.

引用

页数：6

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