pi-Junction behavior and Andreev bound states in Kondo quantum dots with superconducting leads

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dc.creatorSellier, Gabriel
dc.creatorKopp, Thilo
dc.creatorKroha, Johann
dc.creatorBarash, Yuri S.
dc.date2005-04-26
dc.date2005-05-03
dc.date.accessioned2026-07-07T08:15:10Z
dc.date.available2026-07-07T08:15:10Z
dc.descriptionWe investigate the temperature- and coupling-dependent transport through Kondo dot contacts with symmetric superconducting s-wave leads. For finite temperature T we use a superconducting extension of a selfconsistent auxiliary boson scheme, termed SNCA, while at T=0 a perturbative renormalization group treatment is applied. The finite-temperature phase diagram for the 0--pi transition of the Josephson current in the junction is established and related to the phase-dependent position of the subgap Kondo resonance with respect to the Fermi energy. The conductance of the contact is evaluated in the zero-bias limit. It approaches zero in the low-temperature regime, however, at finite T its characteristics are changed through the coupling- and temperature-dependent 0--pi transition.
dc.description12 pages, 12 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0504649
dc.identifierhttp://arxiv.org/abs/cond-mat/0504649
dc.identifierPhys. Rev. B 72, 174502 (2005)
dc.identifierdoi:10.1103/PhysRevB.72.174502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/133367
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titlepi-Junction behavior and Andreev bound states in Kondo quantum dots with superconducting leads
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