Low Temperature Physics: 41, 70 (2015); https://doi.org/10.1063/1.4904445
Физика Низких Температур: Том 41, Выпуск 1 (Январь 2015), c. 90-95    ( к оглавлению , назад )

Magnetically controlled single-electron shuttle

O.A. Ilinskaya1, S.I. Kulinich1, I.V. Krive1,2, R.I. Shekhter3, and M. Jonson3,4

1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: kulinich@ilt.kharkov.ua

2Physical Department, V.N. Karazin National University, Kharkov 61077, Ukraine

3Department of Physics, University of Gothenburg, SE-412 96 Göteborg, Sweden

4SUPA, Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK

Received November 4, 2014


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 dependence 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.

PACS: 81.07.Oj Nanoelectromechanical systems (NEMS);
PACS: 72.25.–b Spin-polarized transport;
PACS: 73.23.Hk Coulomb blockade; single-electron tunneling.

Key words: nanoelectromechanical systems, Coulomb blockade, spin-polarized transport.

Published online: November 24, 2014