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Josephson current through a precessing classical spin
Universités Paris 6, 7 et CNRS, France ; CNRS and Université Joseph Fourier, France.
CNRS and Université Joseph Fourier, France ; Chalmers University of Technology .ORCID iD: 0000-0001-5551-8980
INAC/SPSMS, France.
CNRS and Université Joseph Fourier, France.
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2009 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, E-ISSN 1873-2135, Vol. 404, 527-529 p.Article in journal (Refereed) Published
Abstract [en]

A study of the dc Josephson current between two superconducting leads in the presence of a precessingclassical spin is presented. The precession gives rise to a time-dependent tunnel potential which notonly implies different tunneling probabilities for spin-up and spin-down quasiparticles, but introducesalso a time-dependent spin-flip term. We provide an exact general analytic solution for the out-of-equilibrium steady-state permanent current between two spin-singlet superconductors as a functionof the superconducting phase difference, the precession frequency and for arbitrary junction transparency.As an application we focus on the effects of the spin-flip term alone and show that the magnitude andnature of the Josephson current are indeed strongly affected by the precession of the classical spin.

Place, publisher, year, edition, pages
2009. Vol. 404, 527-529 p.
National Category
Condensed Matter Physics
Research subject
Physics, Condensed Matter Physics
Identifiers
URN: urn:nbn:se:lnu:diva-63811DOI: 10.1016/j.physb.2008.11.053OAI: oai:DiVA.org:lnu-63811DiVA: diva2:1095373
Available from: 2017-05-12 Created: 2017-05-12 Last updated: 2017-05-15Bibliographically approved

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Holmqvist, Cecilia
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