Conductance fluctuations and quantum chaotic scattering in semiconductor microstructures

被引：77

作者：

Marcus, C. M. ^{[1
,2
]}

Westervelt, R. M. ^{[1
,2
]}

Hopkins, P. F. ^{[3
]}

Gossard, A. C. ^{[3
]}

机构：

[1] Harvard Univ, Div Appl Sci, Cambridge, MA 02138 USA

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

CHAOS | 1993年 / 3卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.165927

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

We review recent experiments on aperiodic conductance fluctuations in ballistic GaAs/AlGaAs microstructures in the shape of a stadium billiard and a circle with point-contact leads, measured at millikelvin temperatures. Much of the observed behavior can be analyzed within a semiclassical approach to quantum chaotic scattering. After a brief review of the Landauer-Buttiker formulation of coherent transport, a variety of novel experimental phenomena and comparisons to semiclassical theory are presented. In particular, we discuss quantum-enhanced backscattering, the power spectrum of conductance fluctuations, crossover to the high-magnetic-field and tunneling regimes, and an application allowing the rate of phase-randomizing scattering to be measured in chaotic ballistic microstructures.

引用

页码：643 / 653

页数：11

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