Eur. Phys. J. B (2013) 86: 151
https://doi.org/10.1140/epjb/e2013-30720-5

Regular Article

Spin polarization effect on spin Coulomb drag in a two-dimensional electron system

¹ Department of Physics, Qom branch, Islamic Azad University, 3714668669 Qom, Iran
² Physics Department, Kharazmi University, 3197937551 Karaj, Iran

^a e-mail: aesmailian@qom-iau.ac.ir

Received: 3 August 2012
Received in final form: 7 January 2013
Published online: 10 April 2013

Abstract

We study the effect of spin polarization on spin-drag transresistivity in a two-dimensional (2D) electron gas at temperature T beyond the random phase approximation (RPA). We make use of spin resolved static local field factors for 2D spin polarized electron gas to take into account the many-body electronic correlation beyond the RPA. The main result of our work is that the reduction in spin Coulomb drag (SCD), due to the spin polarization of the system, is significantly compensated by the inclusion of the many-body local field corrections. We also calculate the temperature behavior of spin diffusion constant based on SCD theory for a spin polarized electron system.