Magneto-gyrotropic photogalvanic effects in semiconductor quantum wells

被引：77

作者：

Bel'kov, VV ^{[1
]}

Ganichev, SD

Ivchenko, EL

Tarasenko, SA

Weber, W

Giglberger, S

Olteanu, M

Tranitz, HP

Danilov, SN

Schneider, P

Wegscheider, W

Weiss, D

Prettl, W

机构：

[1] Univ Regensburg, Fak Phys, D-93040 Regensburg, Germany

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

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2005年 / 17卷 / 21期

关键词：

D O I：

10.1088/0953-8984/17/21/032

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We show that free-carrier (Drude) absorption of both polarized and unpolarized terahertz radiation in quantum well (QW) structures causes an electric photocurrent in the presence of an in-plane magnetic field. Experimental and theoretical analysis evidences that the observed photocurrents are spin dependent and related to the gyrotropy of the QWs. Microscopic models, for the photogalvanic effects in QWs based on asymmetry of photoexcitation and relaxation processes are proposed. In most of the investigated structures the observed magneto-induced photocurrents are caused by spin-dependent relaxation of non-equilibrium carriers.

引用

页码：3405 / 3428

页数：24

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