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

Chevallier, D. and Trif, M. and Dutreix, C. and Guigou, M. and Quay, C. H. L. and Aprili, M. and Bena, C.. (2018) Superconductor spintronics: modeling spin and charge accumulation in out-of-equilibrium NIS junctions subjected to Zeeman magnetic fields. New Journal of Physics, 20. 013014.

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Abstract

We study the spin and charge accumulation in a superconductor when a normal-superconductor tunnel junction is subjected to a Zeemanmagnetic field and taken out of equilibrium by applying either aDCor AC voltage bias. Wefocus on a configuration which allows one to measure non-locally the spin-accumulation using a second ferromagnetic electrode. Ourmain 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, whichwe show to deviate drastically from its equilibrium value.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretical Nano/Quantum Physics (Klinovaja)
UniBasel Contributors:Chevallier, Denis
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:IOP Publishing
ISSN:1367-2630
e-ISSN:1367-2630
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:07 Mar 2018 14:49
Deposited On:07 Mar 2018 14:49

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