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- Title
Violation of the Ambegaokar-Baratoff Relation in Dirty S-I-S Junctions.
- Authors
Kirpichenkov, V. Ya.; Kirpichenkova, N. V.; Lozin, O. I.; Kryzhanovskii, K. V.
- Abstract
It has been shown that the presence of narrow-gap quantum jumpers in "dirty" (low concentrations of identical nonmagnetic impurities in the insulator layer) superconductor-insulator-superconductor (S-I-S) junctions results in a significant deviation of the critical supercurrent (Josephson current) in the temperature range 0 ≤ T ≤ Tc (Tc is the superconducting transition temperature in the S shores of the junction) from the value given by the known Ambegaokar-Baratoff relation. It has been found that the character of this deviation changes at a certain nonzero temperature Tb < Tc: this deviation is negative at 0 ≤ T< Tb (deficiency of the supercurrent), whereas it is positive at Tb< T ≤ Tc (excess of the supercurrent). Estimates indicate that experimental manifestation of this effect can be detected.
- Subjects
ATOMIC transitions; NONMAGNETIC steel; ELECTRIC insulators &; insulation; SUPERCONDUCTOR-insulator-superconductor devices; TEMPERATURE measurements
- Publication
JETP Letters, 2018, Vol 108, Issue 11, p759
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364018230066