Effect of structure anisotropy on low temperature spin dynamics in quantum wells

被引：24

作者：

Glazov, M. M. ^{[1
]}

机构：

[1] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia

来源：

SOLID STATE COMMUNICATIONS | 2007年 / 142卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

two-dimensional electron gas; spin relaxation; conduction-band spin splitting;

D O I：

10.1016/j.ssc.2007.03.045

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Spin dynamics of two-dimensional electron gas confined in an asymmetrical quantum well is studied theoretically in the regime where the scattering frequency is comparable with the spin precession frequency due to the conduction band spin splitting. The spin polarization is shown to demonstrate quantum beats. If the spin splitting is determined by both bulk and structural asymmetry mechanisms the beats are damped at zero temperature even in the absence of a scattering. We calculate the decay of spin beats due to the thermal broadening of the electron distribution function and electron scattering. The magnetic field applied along the structure growth axis is shown to increase the frequency of the beats and shift system towards the collision dominated regime. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：531 / 535

页数：5

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