Nonadiabatic Josephson dynamics in junctions with in-gap quasiparticles
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Nonadiabatic Josephson dynamics in junctions with in-gap quasiparticles
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| Creator |
Michelsen, J.
Shumeiko, V.S. |
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| Subject |
Quantum coherent effects in superconductors and normal metals
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| Description |
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.
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| Date |
2017-05-24T05:15:51Z
2017-05-24T05:15:51Z 2010 |
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| Type |
Article
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| Identifier |
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.
0132-6414 PACS: 74.50.+r, 74.78.Na, 72.10.Bg http://dspace.nbuv.gov.ua/handle/123456789/117518 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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