Impurity effects on the anisotropic {ital s}-wave superconductor of the interlayer pair tunneling mechanism
- International Center for Theoretical Physics, P.O. Box 586, 34100 Trieste (Italy)
We study the effects of nonmagnetic impurities in the interlayer pair tunneling mechanism for an anisotropic {ital s}-wave (ASW) superconductor proposed by Anderson {ital et} {ital al}. using the self-consistent {ital T}-matrix approximation. We found that the impurity effects on this particular model are quite different from those of the conventional ASW model of the BCS-type pairing. It shows a much stronger suppression of {ital T}{sub {ital c}} upon doping with nonmagnetic impurities than in the conventional ASW pairing state. Moreover, the minimum-energy gap does not monotonically grow with increasing impurity concentration but instead it quickly shrinks. We also show that the temperature dependence of the gap anisotropy ratio, {ital R}({ital T})={Delta}{sub max}({ital T})/{Delta}{sub min}({ital T}) increases with increasing temperature which has a similar trend with a recent experiment by Ma {ital et} {ital al}.
- OSTI ID:
- 76452
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 2 Vol. 52; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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