Theory of the coherent spin dynamics in magnetic semiconductor quantum wells

被引：21

作者：

Linder, N ^{[1
]}

Sham, LJ ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

PHYSICA E | 1998年 / 2卷 / 1-4期

基金：

美国国家科学基金会;

关键词：

diluted magnetic semiconductors; Faraday rotation; coherent spin precession; sp-d exchange interaction;

D O I：

10.1016/S1386-9477(98)00085-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We present a theory of time-resolved Faraday rotation for semimagnetic quantum well structures in the Voigt configuration. The nonlinear part of the Faraday relation signal is expressed as probing the carrier spin populations requiring an off-resonant probe frequency. Our computed results confirm experimental findings of electron spin precession and independent electron and hole spin relaxation. Inclusion of the coherent dynamics of the Mn-spin system in our theory shows that optically created carriers can initiate a long-living precession of the Mn-spins, leading to oscillations which are observed through the linear Faraday rotation. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：412 / 416

页数：5

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