Temperature Dependence of Microwave Photoresistance in 2D Electron Systems

A. T. Hatke, M. A. Zudov, L. N. Pfeiffer, K. W. West

Published 2009-01-07, updated 2009-01-08Version 2

We report on the temperature dependence of microwave-induced resistance oscillations in high-mobility two-dimensional electron systems. We find that the oscillation amplitude decays exponentially with increasing temperature, as $\exp(-\alpha T^2)$, where $\alpha$ scales with the inverse magnetic field. This observation indicates that the temperature dependence originates primarily from the modification of the single particle lifetime, which we attribute to electron-electron interaction effects.