Linear polarization sensitivity of magnetotransport in irradiated two-dimensional electron systems

We study the role of the linear polarization angle of radiation on the magnetoresistance oscillations in irradiated two-dimensional electron systems. We consider different regimes, from the radiation electric field parallel to the current to perpendicular to it. We obtain, in agreement with the experimental results, that magnetoresistance is sensitive to the orientation of the radiation electric field and that magnetoresistance oscillations (peaks and valleys) decrease from the parallel scenario to the perpendicular one. This is in clear contradiction with previous experimental and theoretical evidences. Here, we present a novel theoretical approach trying to reconcile both scenarios. (C) 2013 AIP Publishing LLC.