Andreev levels in a single-channel conductor

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dc.creatorTitov, M.
dc.creatorMortensen, N. A.
dc.creatorSchomerus, H.
dc.creatorBeenakker, C. W. J.
dc.date2001-03-21
dc.date2001-03-23
dc.date.accessioned2026-07-07T02:40:48Z
dc.date.available2026-07-07T02:40:48Z
dc.descriptionWe calculate the subgap density of states of a disordered single-channel normal metal connected to a superconductor at one end (NS junction) or at both ends (SNS junction). The probability distribution of the energy of a bound state (Andreev level) is broadened by disorder. In the SNS case the two-fold degeneracy of the Andreev levels is removed by disorder leading to a splitting in addition to the broadening. The distribution of the splitting is given precisely by Wigner's surmise from random-matrix theory. For strong disorder the mean density of states is largely unaffected by the proximity to the superconductor, because of localization, except in a narrow energy region near the Fermi level, where the density of states is suppressed with a log-normal tail.
dc.description12 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0103445
dc.identifierhttp://arxiv.org/abs/cond-mat/0103445
dc.identifierPhys. Rev. B 64, 134206 (2001)
dc.identifierdoi:10.1103/PhysRevB.64.134206
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17509
dc.subjectMesoscale and Nanoscale Physics
dc.subjectDisordered Systems and Neural Networks
dc.titleAndreev levels in a single-channel conductor
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