The quantized acoustoelectric current for different lengths of a quasi-one-dimensional channel

被引：6
作者：
Chen, S. W. [2 ]
Guo, H. Z. [2 ]
Zhang, W. [2 ]
Song, L. [2 ]
Lu, C. [1 ]
Gao, J. [1 ,2 ]
机构：
[1] Natl Inst Measurement & Testing Technol, Chengdu 610021, Peoples R China
[2] Sichuan Univ, Dept Phys, Lab Mesoscop & Low Dimens Phys, Chengdu 610064, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2009年 / 149卷 / 43-44期
基金：
中国国家自然科学基金;
关键词：
Semiconductors; Quantum wells; Acoustoelectric effect; SURFACE ACOUSTIC-WAVES; SINGLE-ELECTRON TRANSPORT; CONDUCTANCE; BREAKDOWN; DRIVEN;
D O I：
10.1016/j.ssc.2009.07.046
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A length-dependent investigation of quantized acoustoelectric current in shallow-etched constrictions is reported. We analyze the quantized precision for different channel lengths. The study indicates that there is a significant effect of the channel length on the quality of quantized current. As the channel length becomes too short or too long, poor plateaus are shown, and some reasonable explanations about this behavior are presented. Furthermore, obvious deviations from the ideal quantized value are observed for long constrictions in our experiments, and a mechanism which is different from previous discussions is put forward to be responsible for this behavior. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1909 / 1913
页数：5
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