Anomalous dephasing of two-dimensional electrons in an AlGaAs/GaAs parabolic quantum well structure

被引：4

作者：

Gao, K. H. ^{[1
,2
]}

Yu, G. ^{[2
]}

SpringThorpe, A. J. ^{[3
]}

Austing, D. G. ^{[3
]}

Lin, T. ^{[2
]}

Hu, G. J. ^{[2
]}

Dai, N. ^{[2
]}

Chu, J. H. ^{[1
,2
]}

机构：

[1] E China Normal Univ, Minist Educ, Key Lab Polar Mat & Devices, Shanghai 200062, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China

[3] Natl Res Council Canada, Inst Microstruct Sci M50, Ottawa, ON K1A 0R6, Canada

来源：

SOLID STATE COMMUNICATIONS | 2011年 / 151卷 / 21期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

AlGaAs/GaAs quantum well; Weak localization; Electron dephasing; MAGNETIC-FIELD; LOCALIZATION; SCATTERING;

D O I：

10.1016/j.ssc.2011.07.033

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetoconductivity measurements are performed on a parabolic quantum well structure. The weak localization effect is observed at a low magnetic field for both single-subband and double-subband occupation regimes. Applying weak-localization theory, we have extracted the dephasing rate. The extracted dephasing rate increases with increasing conductivity in the small-energy-transfer regime and shows a similar trend as the electron density is increased in the large-energy-transfer regime. This is in conflict with Fermi-liquid theory, and cannot be attributed to electron-phonon scattering. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1537 / 1540

页数：4

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