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

被引：39
|
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
收藏
页码：8118 / 8121
页数：4
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