Nonequilibrium supercurrents in mesoscopic Nb-InAs-Nb junctions

Authors
Lehnert, KW Argaman, N Blank, HR Wong, KC Allen, SJ Hu, EL Kroemer, H
Citation
Kw. Lehnert et al., Nonequilibrium supercurrents in mesoscopic Nb-InAs-Nb junctions, MICROEL ENG, 47(1-4), 1999, pp. 377-379
Citations number
6
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
MICROELECTRONIC ENGINEERING
ISSN journal
01679317 → ACNP
Volume
47
Issue
1-4
Year of publication
1999
Pages
377 - 379
Database
ISI
SICI code
0167-9317(199906)47:1-4<377:NSIMNJ>2.0.ZU;2-Y
Abstract
Microwave irradiation of Nb-InAs-Nb single-junctions demonstrates that the half-integer Shapiro step is caused by ac nonequilibrium supercurrents. In addition, nonequilibrium de supercurrents are observed as a conductance enh ancement around zero bias. Both effects persist to temperatures well above the disappearance of the equilibrium critical current and integer Shapiro s tep.