UNIVERSAL CONDUCTANCE FLUCTUATIONS IN A MULTI-SUBBAND QUANTUM-WELL

被引：3

作者：

CARMONA, HA ^{[1
]}

GEIM, AK ^{[1
]}

LANGERAK, CJGM ^{[1
]}

FOSTER, TJ ^{[1
]}

BROWN, CV ^{[1
]}

MAIN, PC ^{[1
]}

BEAUMONT, SP ^{[1
]}

机构：

[1] UNIV GLASGOW,DEPT ELECTR & ELECT ENGN,GLASGOW G12 8QQ,SCOTLAND

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1994年 / 6卷 / 27期

关键词：

D O I：

10.1088/0953-8984/6/27/021

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have investigated mesoscopic conductance fluctuations in a GaAs quantum well with five electrically quantized two-dimensional (2D) subbands occupied. In contrast to the case of a single occupied subband, where the fluctuations depend only on the component of magnetic field perpendicular to the plane of die electrons, in our multi-subband structures the conductance fluctuations occur even in a magnetic field parallel to the plane. We attribute the fluctuations to rapid electron-impurity scattering between different 2D subbands which leads to quasi-3D motion of electrons within the quantum well. We are able to confirm the 3D character of the fluctuations by correlations between the magnetoresistances observed when the magnetic field is applied at various angles relative to the plane of the quantum well.

引用

页码：5129 / 5136

页数：8

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