CHEVALLIER, D.; TRIF, M.; DUTREIX, C.; GUIGOU, M.; QUAY, C. H. L.; APRILI, M.; BENA, C.

doi:10.1088/1367-2630/aa9cc7

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CHEVALLIER, D.
Universiteit Leiden = Leiden University

TRIF, M.
Institut de Physique Théorique - UMR CNRS 3681 [IPHT]

DUTREIX, C.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Laboratoire de Physique des Solides [LPS]

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New Journal of Physics. 2018, vol. 20, p. 013014

Institute of Physics: Open Access Journals

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We study the spin and charge accumulation in a superconductor when a normal-superconductor tunnel junction is subjected to a Zeeman magnetic field and taken out of equilibrium by applying either a DC or AC voltage bias. We focus on a configuration which allows one to measure non-locally the spin-accumulation using a second ferromagnetic electrode. Our main result is that, in the presence of an AC bias, the time average of the detected non-local signal is frequency dependent, and the frequency at which the saturation occurs is directly related to the inverse of the spin-relaxation time. For a DC bias we also address the effect of the spin accumulation in the normal leads and we investigate the out-of-equilibrium spin susceptibility of the SC, which we show to deviate drastically from its equilibrium value.< Leer menos

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spin accumulation in superconductors

out of equilibrium normal-superconductor tunnel junction subjected to Zeeman field

spintronics

spin accumulation in superconductors

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Superconductor spintronics: modeling spin and charge accumulation in out-of-equilibrium NIS junctions subjected to Zeeman magnetic fields

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