Nonequilibrium ac Josephson effect in mesoscopic Nb-InAs-Nb junctions

Details Nonequilibrium ac Josephson effect in mesoscopic Nb-InAs-Nb junctions Nonequilibrium ac Josephson effect in mesoscopic Nb-InAs-Nb junctions

1999-01-03

arxiv.org/abs/cond-mat/9901006v1

Physics

Condensed Matter

Superconductivity

4 pages, 4 embedded figures, to be published in Phys. Rev. Lett. An HTML presentation of these results is available at http:

Scientific paper

10.1103/PhysRevLett.82.1265

Microwave irradiation of Nb-InAs-Nb junctions reveals frequency-doubled
Josephson currents which persist to high temperatures, in the absence of a
critical current. A nonequilibrium dynamical model, based on time-dependent
Andreev bound states, successfully accounts for the resulting half-integer
Shapiro step and an enhancement in the conductance near zero bias.

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