ELASTIC-SCATTERING AND THE CURRENT-VOLTAGE CHARACTERISTICS OF SUPERCONDUCTING NB-INAS-NB JUNCTIONS

Authors
VANDERPOST N NITTA J TAKAYANAGI H
Citation
N. Vanderpost et al., ELASTIC-SCATTERING AND THE CURRENT-VOLTAGE CHARACTERISTICS OF SUPERCONDUCTING NB-INAS-NB JUNCTIONS, Applied physics letters, 63(18), 1993, pp. 2555-2557
Citations number
9
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
63
Issue
18
Year of publication
1993
Pages
2555 - 2557
Database
ISI
SICI code
0003-6951(1993)63:18<2555:EATCCO>2.0.ZU;2-S
Abstract
Superconducting niobium contacts are attached to a 0.8-mum-long epitax ially grown InAs channel sandwiched between insulating InGaAs layers. The current-voltage characteristics show nonlinearities at submultiple s of the superconducting energy gap indicative of multiple-Andreev ref lections. We demonstrate that an increase in the elastic scattering ra te 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.