WIGNER-SEITZ APPROACH TO SPIN SPLITTING IN DILUTED MAGNETIC SEMICONDUCTORS

被引：58

作者：

LAGUILLAUME, CBA

SCALBERT, D

DIETL, T

机构：

[1] UNIV PARIS 06, PHYS SOLIDES GRP, F-75251 PARIS 05, FRANCE

[2] JOHANNES KEPLER UNIV, INST HALBLEITERPHYS, A-4040 LINZ, AUSTRIA

[3] POLISH ACAD SCI, INST PHYS, PL-02668 WARSAW, POLAND

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.46.9853

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A method is proposed that allows for a more precise evaluation of the spin splitting of electronic levels induced by the exchange interaction between effective-mass electrons and localized magnetic moments in diluted magnetic semiconductors. The method is nonperturbative, surpasses the molecular-field approximation (MFA), and is developed in the spirit of the muffin-tin model. Surprisingly, the corrections to the MFA exhibit a strong variation with the concentration of magnetic ions, accounting for the hitherto unexplained dependence of the apparent p-d exchange integral on x in Cd1-xMnxS.

引用

页码：9853 / 9856

页数：4

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