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Current-voltage characteristics of shunted Josephson weak links with excess current

1995; IEEE Council on Superconductivity; Volume: 5; Issue: 2 Linguagem: Inglês

10.1109/77.403104

1558-2515

R. Seed, C. Vittoria, A. Widom,

Quantum and electron transport phenomena

Many superconducting Josephson weak link junctions are not adequately or accurately modeled by the resistively shunted junction model. For point contact junctions, step edge junctions and grain boundary junctions, a large excess current in the I-V characteristic is often observed. A new model has been proposed, which provides a more accurate technique of describing the behavior. Using this theory of shunted weak link junctions with excess current, calculations are presented here which accurately describe the magnitude and position of microwave induced current steps in the dc current versus voltage characteristics of such devices. >