Thermally activated intersubband scattering and oscillating magnetoresistance in quantum wells

被引：16

作者：

Wiedmann, S. ^{[1
,2
]}

Gusev, G. M. ^{[3
]}

Raichev, O. E. ^{[4
]}

Bakarov, A. K. ^{[5
]}

Portal, J. C. ^{[1
,2
,6
]}

机构：

[1] CNRS INSA UJF UPS, LNCMI, UPR 3228, F-38042 Grenoble 9, France

[2] INSA Toulouse, F-31077 Toulouse 4, France

[3] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

[4] NAS Ukraine, Inst Semicond Phys, UA-03028 Kiev, Ukraine

[5] Inst Semicond Phys, Novosibirsk 630090, Russia

[6] Inst Univ France, F-75005 Paris, France

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 16期

基金：

巴西圣保罗研究基金会;

关键词：

HETEROJUNCTIONS; SYSTEMS; GAS;

D O I：

10.1103/PhysRevB.82.165333

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental studies of magnetoresistance in high-mobility wide quantum wells reveal oscillations which appear with an increase in temperature to 10 K and whose period is close to that of Shubnikov-de Haas oscillations. The observed phenomenon is identified as magnetointersubband oscillations caused by the scattering of electrons between two occupied subbands and the third subband which becomes occupied as a result of thermal activation. These small-period oscillations are less sensitive to thermal suppression than the large-period magnetointersubband oscillations caused by the scattering between the first and the second subbands. Theoretical study, based on consideration of electron scattering near the edge of the third subband, gives a reasonable explanation of our experimental findings.

引用

页数：8

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