SUPERCURRENT TRANSPORT THROUGH A HIGH-MOBILITY 2-DIMENSIONAL ELECTRON-GAS

被引：40

作者：

MARSH, AM ^{[1
]}

WILLIAMS, DA ^{[1
]}

AHMED, H ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,CAVENDISH LAB,HITACHI CAMBRIDGE LAB,CAMBRIDGE CB3 0HE,ENGLAND

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.50.8118

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate that a supercurrent can flow through a high-mobility two-dimensional electron gas (2DEG) between two superconducting contacts 1 mu m apart. The AlxGa1-xAs/GaAs channel length is over 10 times the proximity-effect-induced coherence length in the semiconductor, and electrons travel ballistically between the contacts. The supercurrent is destroyed when the mobility of the 2DEG is reduced by electron-beam irradiation, suggesting that the supercurrent results from coherent Andreev reflection and ballistic transport between the superconducting electrodes.

引用

页码：8118 / 8121

页数：4

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