Eur. Phys. J. B 53, 455-461 (2006)
https://doi.org/10.1140/epjb/e2006-00404-6

Spin-polarized transport through a time-periodic non-magnetic semiconductor heterostructure

¹ The American College, Madurai, 625002, India
² School of Physics, Madurai-Kamaraj University, Madurai, 625021, India

Corresponding authors: ^a kgnnskr@yahoo.com - ^b drknk2003@yahoo.co.in

Received: 8 August 2006
Revised: 21 September 2006
Published online: 8 November 2006

Abstract

Spin-dependent Floquet scattering theory is developed to investigate the photon-assisted spin-polarized electron transport through a semiconductor heterostructure in the presence of an external electric field. Spin-dependent Fano resonances and spin-polarized electron transport through a laser irradiated time-periodic non-magnetic heterostructure in the presence of Dresselhaus spin-orbit interaction and a gate-controlled Rashba spin-orbit interaction are investigated. The electric field due to laser along with the spin-orbit interactions help to get spin-dependent Fano resonances in the conductance, whereas the external bias can be appropriately adjusted to get a near 80% spin-polarized electron transmission through heterostructures. The resultant nature of the Floquet scattering depends on the relative strength of these two electric fields.