Josephson critical current in a long mesoscopic S-N-S junction
P. Dubos, H. Courtois, B. Pannetier, F. K. Wilhelm, A. D. Zaikin, G. Schön
DOI 10.1103/PhysRevB.63.064502 · Physical Review B
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Abstract
We carry out an extensive experimental and theoretical study of the Josephson effect in S-N-S junctions made of a diffusive normal metal (N) embedded between two superconducting electrodes (S). Our experiments are performed on Nb-Cu-Nb junctions with highly transparent interfaces. We give the predictions of the quasiclassical theory in various regimes on a precise and quantitative level. We describe the crossover between the short- and the long-junction regimes and provide the temperature dependence of the critical current using dimensionless units eRNIc/εc and kBT/εc, where εc is the Thouless energy. Experimental and theoretical results are in excellent quantitative agreement.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.1 | Pressure not reported | unknown |
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