Drude absorption and electron localization in GaAs/AlGaAs superlattices

被引：6
|
作者：
Tamura, K [1 ]
Hirakawa, K [1 ]
Shimada, Y [1 ]
机构：
[1] Univ Tokyo, Inst Ind Sci, Minato Ku, Tokyo 1068558, Japan
来源：
PHYSICA B | 1999年 / 272卷 / 1-4期
关键词：
superlattice; miniband; far-infrared spectroscopy; localization; cyclotron resonance;
D O I：
10.1016/S0921-4526(99)00379-8
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have investigated the electron conduction in semiconductor superlattices (SL) by measuring free carrier absorption by far-infrared (FIR) spectroscopy. It is found that the momentum relaxation time, tau, is quite anisotropic; tau in the SL direction (growth direction), tau(SL), being approximately shorter by a factor of two than that for the in-plane direction, tau(parallel to). Furthermore, suppression of the long-range conductivity in the SL direction has been observed and attributed to the localization due to potential disorder. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：183 / 186
页数：4
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