Spin Coulomb Drag

Samvel Badalyan

University of Regensburg, Germany

We study the spin Coulomb drag in a quasi-two-dimensional electron gas of finite transverse width, including local field corrections beyond the random phase approximation (RPA). We find that the finite transverse width of the electron gas causes a significant reduction of the spin Coulomb drag. This reduction, however, is largely compensated by the enhancement coming from the inclusion of many-body local field effects beyond the RPA, thereby restoring very good agreement with the experimental findings by C. P. Weber et al., Nature, 437, 1330 (2005). Our results verify the observation of the spin Coulomb drag.