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.
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页数：4
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