OBSERVATION OF PAIR CURRENTS IN SUPERCONDUCTOR-SEMICONDUCTOR CONTACTS

被引：290

作者：

KASTALSKY, A

KLEINSASSER, AW

GREENE, LH

BHAT, R

MILLIKEN, FP

HARBISON, JP

机构：

[1] BELLCORE,RED BANK,NJ 07701

[2] IBM CORP,THOMAS J WATSON RES CTR,DIV RES,YORKTOWN HTS,NY 10598

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.67.3026

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An excess low-voltage conductance is observed in Nb-InGaAs contacts at low temperatures and interpreted as being due to a pair current across the superconductor-semiconductor interface. This is the first observation of a pair current, a nonequilibrium manifestation of the proximity effect, in junctions having one electrode which is not a superconductor. A model is presented which accounts for the observed behavior. In addition to the pair current, it is demonstrated that these junctions exhibit excess conductance due to Andreev scattering.

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页码：3026 / 3029

页数：4

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