Eur. Phys. J. B (2015) 88: 83
https://doi.org/10.1140/epjb/e2015-50809-y

Regular Article

Bound states and persistent currents in presence of torsion and Rashba spin-orbit coupling

TIFR Centre for Interdisciplinary Sciences, Hyderabad 500075, India

^a e-mail: debabratas@tifrh.res.in

Received: 20 November 2014
Received in final form: 27 February 2015
Published online: 1 April 2015

Abstract

We study a model of an electron on a cylindrical surface, which is coupled to the torsion field due to a dislocation along the axis of the cylinder. We discuss the effect of this torsion field on the energy spectrum of the electrons and analytically calculate persistent currents in the presence of Rashba spin-orbit coupling. Our results show that the presence of the torsional field due to the dislocation significantly modifies the energy spectrum of the system. The dislocation induced persistent spin current in this system is calculated, and we find a correspondence between the dislocation mediated spin current and the azimuthal spin current.