Spin polarization of an optically pumped electron gas

被引：9

作者：

Potemski, M

Pérez, E

Martin, D

Viña, L

Gravier, L

Fisher, A

Ploog, K

机构：

[1] Max Planck Inst Festkorperforsch, Grenoble High Magnet Field Lab, F-38042 Grenoble 9, France

[2] CNRS, F-38042 Grenoble, France

[3] Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain

[4] Max Planck Inst Festkorperforsch, D-8000 Munich, Germany

[5] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany

来源：

SOLID STATE COMMUNICATIONS | 1999年 / 110卷 / 03期

关键词：

quantum wells; optical properties; spin dynamics; time-resolved optical spectroscopies;

D O I：

10.1016/S0038-1098(98)00616-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Time-resolved optical-pumping experiments on p-type GaAs quantum wells are applied to study the spin polarization of a two dimensional electron gas (2DEG) in the density range up to similar to 5 X 10(11) cm(-2). Two spin components of optically created 2DEG are well described by Fermi-Dirac distributions with a common temperature but different chemical potentials, The rate of the spin depolarization of the 2DEG is found to be independent of the electron kinetic energy but accelerated by thermal spreading of carriers. This acceleration is attributed to the opening of the phase space blocking for the exchange-type electron spin-flip scattering with holes. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：163 / 168

页数：6

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