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Magnetically controlled single-electron shuttle

Journal article
Authors O. A. Ilinskaya
Ilya V. Krive
Robert I. Shekhter
Mats Jonson
Published in Low temperature physics
Volume 41
Issue 1
Pages 70-74
ISSN 1063-777X
Publication year 2015
Published at Department of Physics (GU)
Pages 70-74
Language en
Links dx.doi.org/10.1063/1.4904445
Keywords nanomechanics, single-electron tunneling, spintronics
Subject categories Mesoscopic physics

Abstract

A theory of single-electron shuttling in an external magnetic field in nanoelectromechanical system with magnetic leads is presented. We consider partially spin-polarized electrons in the leads and electron transport in both the Coulomb blockade regime and in the limit of large bias voltages when the Coulomb blockade is lifted. The influence of the degree of spin polarization on shuttle instability is considered. It is shown that there is certain degree of spin polarization above which the magnetic field ceases to control electron transport. In the Coulomb blockade regime the depend- ence of the threshold magnetic field, which separates the “shuttle” and vibron regimes, on the degree of polarization is evaluated. The possibility of re-entrant transitions to the shuttle phase is discussed.

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