Magneto-transport study of Landau level broadening in a gated AlGaAs/GaAs parabolic quantum well structure

被引：3
|
作者：
Zhou, Y. M. [1 ]
Yu, G. [2 ]
Lin, T. [2 ]
Dai, N. [2 ]
Chu, J. H. [2 ]
机构：
[1] Hubei Univ Technol, Sch Elect & Elect Engn, Wuhan 430068, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2012年 / 407卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Parabolic quantum well; Two-dimensional electron gas; Landau level broadening; Shubnikov-de Haas oscillation; 2-DIMENSIONAL ELECTRON-SYSTEMS; DENSITY; STATES; GAS; MAGNETIZATION;
D O I：
10.1016/j.physb.2011.09.136
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We study the Landau level broadening by analyzing the Shubnikov-de Haas oscillations in a gated AlGaAs/GaAs parabolic quantum well structure when only one electronic subband is occupied. Small-angle scattering is determined to be important in this system. The Shubnikov-de Haas oscillations are described equally well by employing Gaussian or Lorentzian broadening of the Landau levels at low magnetic field where the quantum localization effect is not important. A possible explanation is that the electron-electron interactions lead to the overlapping of adjacent Landau levels and one can not distinguish between the two broadening types. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：116 / 119
页数：4
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