Polaron percolation in diluted magnetic semiconductors

被引：657
|
作者：
Kaminski, A [1 ]
Das Sarma, S [1 ]
机构：
[1] Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA
来源：
PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 24期
关键词：
D O I：
10.1103/PhysRevLett.88.247202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We theoretically study the development of spontaneous magnetization in diluted magnetic semiconductors as arising from a percolation of bound magnetic polarons. Within the framework of a generalized percolation theory we derive analytic expressions for the Curie temperature and the magnetization in the limit of low carrier density, obtaining excellent quantitative agreement with Monte Carlo simulation results and good qualitative agreement with experimental results.
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页数：4
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