Precession and motional slowing of spin evolution in a high mobility two-dimensional electron gas

被引：110

作者：

Brand, MA

Malinowski, A

Karimov, OZ

Marsden, PA

Harley, RT ^{[1
]}

Shields, AJ

Sanvitto, D

Ritchie, DA

Simmons, MY

机构：

[1] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England

[2] Toshiba Res Europe Ltd, Cambridge CB4 4WE, England

[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 23期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.89.236601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Optical spin-dynamic measurements in a high-mobility n-doped GaAs/AlGaAs quantum well show oscillatory evolution at 1.8 K consistent with a quasi-collision-free D'yakonov-Perel'-Kachorovskii regime. Above 5 K evolution becomes exponential as expected for collision-dominated spin dynamics. Momentum scattering times extracted from Hall mobility and Monte Carlo simulation of spin polarization agree at 1.8 K but diverge at higher temperatures, indicating the importance of electron-electron scattering and an intrinsic upper limit for the spin-relaxation rate.

引用

页数：4

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