Apparent critical currents and rf steps in a second-order proximity-induced Josephson effect

Siyuan Han, L. F. Cohen, E. L. Wolf

Research output: Contribution to journalArticle

Abstract

Numerical I(V) results for superconductor insulator normal-metal (S-I-N) tunnel junctions suggest that a unified treatment of the weak excess currents (pair-field susceptibility) and proximity-induced Josephson-effect (PJE) phenomena [apparent critical currents, rf steps, and Fraunhofer-like Ic(B)] is provided by the Geshkenbein-Sokol time-dependent Ginzburg-Landau theory of second-order Josephson effects in S-I-N tunnel junctions. The numerical results and other considerations speak against a recent suggestion that a phase-slip center in the superconducting tip may play a role in PJE point-contact experiments. These considerations confirm the utility of proximity Josephson-effect experiments to probe unconventional superconductivity in materials such as UBE13, as first pointed out by Han et al.

Original languageEnglish (US)
Pages (from-to)8682-8685
Number of pages4
JournalPhysical Review B
Volume42
Issue number13
DOIs
StatePublished - 1990

Fingerprint

Tunnel junctions
Josephson effect
Critical currents
Superconducting materials
proximity
critical current
Metals
Point contacts
Superconductivity
tunnel junctions
Experiments
insulators
metals
suggestion
slip
superconductivity
magnetic permeability
probes

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Apparent critical currents and rf steps in a second-order proximity-induced Josephson effect. / Han, Siyuan; Cohen, L. F.; Wolf, E. L.

In: Physical Review B, Vol. 42, No. 13, 1990, p. 8682-8685.

Research output: Contribution to journalArticle

Han, Siyuan ; Cohen, L. F. ; Wolf, E. L. / Apparent critical currents and rf steps in a second-order proximity-induced Josephson effect. In: Physical Review B. 1990 ; Vol. 42, No. 13. pp. 8682-8685.
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