Elastic scattering and the current-voltage characteristics of superconducting Nb-InAs-Nb junctions

Niko Van Der Post, Junsaku Nitta, Hideaki Takayanagi

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Superconducting niobium contacts are attached to a 0.8-μm-long epitaxially grown InAs channel sandwiched between insulating InGaAs layers. The current-voltage characteristics show nonlinearities at submultiples of the superconducting energy gap indicative of multiple-Andreev reflections. We demonstrate that an increase in the elastic scattering rate in the InAs channel, caused by Ar-ion etching, diminishes the order of Andreev reflections and explains the overall shape of the current-voltage characteristics.

Original languageEnglish
Pages (from-to)2555-2557
Number of pages3
JournalApplied Physics Letters
Volume63
Issue number18
DOIs
Publication statusPublished - 1993

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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