Minigap, Parity Effect and Persistent Currents in SNS Nanorings

Simple item page
dc.creatorKalenkov, Mikhail S.
dc.creatorKloos, Harald
dc.creatorZaikin, Andrei D.
dc.date2006-06-09
dc.date.accessioned2026-07-07T07:12:34Z
dc.date.available2026-07-07T07:12:34Z
dc.descriptionWe have evaluated a proximity-induced minigap in the density of states (DOS) of SNS junctions and SNS nanorings at an arbitrary concentration of non-magnetic impurities. We have demonstrated that an isotropic energy minigap in the electron spectrum opens up already at arbitrarily weak disorder, while angle resolved DOS at higher energies can remain strongly anisotropic. The minigap value $ε_g$ can be tuned by passing a supercurrent through an SNS junction or by applying a magnetic flux $Φ$ to an SNS ring. A non-monotonous dependence of $ε_g$ on $Φ$ has been found at weak disorder. We have also studied persistent currents in isolated SNS nanorings. For odd number of electrons in the ring we have found a non-trivial current-phase (current-flux) relation which -- at relatively high disorder -- may lead to a $π$-junction state and spontaneous currents in the ground state of the system.
dc.description7 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0606240
dc.identifierhttp://arxiv.org/abs/cond-mat/0606240
dc.identifierPhys. Rev. B 74, 184502 (2006)
dc.identifierdoi:10.1103/PhysRevB.74.184502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/112115
dc.subjectSuperconductivity
dc.subjectMesoscale and Nanoscale Physics
dc.titleMinigap, Parity Effect and Persistent Currents in SNS Nanorings
dc.typetext

Files

Collections

arXiv