Nonequilibrium ac Josephson effect 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 ac Josephson effect in mesoscopic Nb-InAs-Nb junctions, PHYS REV L, 82(6), 1999, pp. 1265-1268
Citations number
18
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
82
Issue
6
Year of publication
1999
Pages
1265 - 1268
Database
ISI
SICI code
0031-9007(19990208)82:6<1265:NAJEIM>2.0.ZU;2-3
Abstract
Microwave irradiation of Nb-InAs-Nb junctions reveals frequency-doubled Jos ephson currents which persist to high temperatures, in the absence of a cri tical current. A nonequilibrium dynamical model, based on time-dependent An dreev bound states, successfully accounts for the resulting half-integer Sh apiro, step and an enhancement in the conductance near zero bias. [S0031-90 07(99)08420-3].