Giant supercurrent states in a superconductor-InAs/GaSb-superconductor junction

Xiaoyan Shi, Wenlong Yu, Zhigang Jiang, B. Andrei Bernevig, W. Pan, S. D. Hawkins, J. F. Klem

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Superconductivity in topological materials has attracted a great deal of interest in both electron physics and material sciences since the theoretical predictions that Majorana fermions can be realized in topological superconductors. Topological superconductivity could be realized in a type II, band-inverted, InAs/GaSb quantum well if it is in proximity to a conventional superconductor. Here, we report observations of the proximity effect induced giant supercurrent states in an InAs/GaSb bilayer system that is sandwiched between two superconducting tantalum electrodes to form a superconductor-InAs/GaSb-superconductor junction. Electron transport results show that the supercurrent states can be preserved in a surprisingly large temperature-magnetic field (T - H) parameter space. In addition, the evolution of differential resistance in T and H reveals an interesting superconducting gap structure.

Original languageEnglish (US)
Article number133905
JournalJournal of Applied Physics
Volume118
Issue number13
DOIs
StatePublished - Oct 7 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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