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Nonadiabatic Josephson dynamics in junctions with in-gap quasiparticles

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dc.contributor.author Michelsen, J.
dc.contributor.author Shumeiko, V.S.
dc.date.accessioned 2017-05-24T05:15:51Z
dc.date.available 2017-05-24T05:15:51Z
dc.date.issued 2010
dc.identifier.citation Nonadiabatic Josephson dynamics in junctions with in-gap quasiparticles / J. Michelsen, V.S. Shumeiko // Физика низких температур. — 2010. — Т. 36, № 10-11. — С. 1154–1162. — Бібліогр.: 39 назв. — англ. uk_UA
dc.identifier.issn 0132-6414
dc.identifier.other PACS: 74.50.+r, 74.78.Na, 72.10.Bg
dc.identifier.uri http://dspace.nbuv.gov.ua/handle/123456789/117518
dc.description.abstract Conventional models of Josephson junction dynamics rely on the absence of low-energy quasiparticle states due to a large superconducting gap. With this assumption the quasiparticle degrees of freedom become «frozen out» and the phase difference becomes the only free variable, acting as a fictitious particle in a local in time Josephson potential related to the adiabatic and nondissipative supercurrent across the junction. In this article we develop a general framework to incorporate the effects of low-energy quasiparticles interacting nonadiabatically with the phase degree of freedom. Such quasiparticle states exist generically in constriction type junctions with high transparency channels or resonant states, as well as in junctions of unconventional superconductors. Furthermore, recent experiments have revealed the existence of spurious low-energy in-gap states in tunnel junctions of conventional superconductors — a system for which the adiabatic assumption typically is assumed to hold. We show that the resonant interaction with such low-energy states rather than the Josephson potential defines nonlinear Josephson dynamics at small amplitudes. uk_UA
dc.description.sponsorship This work was supported by the Swedish Research Council (VR), and the European FP7-ICT Project MIDAS. uk_UA
dc.language.iso en uk_UA
dc.publisher Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України uk_UA
dc.relation.ispartof Физика низких температур
dc.subject Quantum coherent effects in superconductors and normal metals uk_UA
dc.title Nonadiabatic Josephson dynamics in junctions with in-gap quasiparticles uk_UA
dc.type Article uk_UA
dc.status published earlier uk_UA

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