Superconductor-semiconductor interaction effects in mesoscopic hybrid structures

被引：17

作者：

Rahman, F ^{[1
]}

Thornton, TJ ^{[1
]}

Huber, R ^{[1
]}

Cohen, LF ^{[1
]}

Yuen, WT ^{[1
]}

Stradling, RA ^{[1
]}

机构：

[1] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,DEPT PHYS,LONDON SW7 2AZ,ENGLAND

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.54.14026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied transport in mesoscopic superconductor-semiconductor hybrid structures consisting of two-dimensional arrays of micrometer-sized niobium dots deposited on high-mobility InAs:GaSb quantum wells. The grating arrays were designed to have a dot size and spacing of 3, 1.5, and 1 mu m, so as to be smaller than the electron mean free path of similar to 5 mu m. At low temperatures all the structures show clear evidence of Andreev reflection while the two smaller period samples also exhibit a proximity-induced superconducting phase. We present measurements of the differential resistance at different temperatures and magnetic fields. For fields greater than 0.3 T, different features are observed in the differential resistance which we attribute to nonuniform flux penetration around the superconducting dots.

引用

页码：14026 / 14031

页数：6

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