Local electronic structure and magnetic properties of (Ga,Cr)N

被引：0

作者：

LIN He DUAN Haiming Department of Physics Xinjiang University Urumqi China ^{[830046
]}

机构：

来源：

ChineseScienceBulletin | 2006年 / 13期

关键词：

diluted magnetic semiconductor; density functional the- ory; cluster model; first-principles calculation; electronic structure;

D O I：

暂无

中图分类号：

O561 [分子物理学];

学科分类号：

070203 ; 1406 ;

摘要：

The local electronic structure and mag- netic properties of diluted magnetic semiconductor (Ga,Cr)N have been studied by using discrete varia- tional method (DVM) based on density functional theory. The magnetic moments per Cr atom vary significantly with Cr concentration, and the trend of variation is in agreement with that of the experiment. The coupling between Cr atoms in the system with two Cr atoms considered is found to be ferromagnetic, and the magnetic moment per Cr atom is similar to the case in which only one Cr atom is considered in the same doping concentration. For all doping con- centrations, the coupling between Cr and the nearest neighbor N is found to be antiferromagnetic, and the Cr 3d states hybridize strongly with N 2p states, which are in agreement with the band calculations.

引用

页码：1546 / 1550

页数：5