Superconductor-semiconductor interaction effects in mesoscopic hybrid structures

F. Rahman, T. Thornton, R. Huber, L. Cohen, W. Yuen, R. Stradling

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

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 μm, so as to be smaller than the electron mean free path of ∼5 μm. 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.

Original languageEnglish (US)
Pages (from-to)14026-14031
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number19
DOIs
StatePublished - Jan 1 1996
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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