Guiding-center-drift resonance in a periodically modulated two-dimensional electron gas

Abstract

A theory is developed for the recently discovered magnetoresistance oscillations in a two-dimensional electron gas subject to a weak periodic potential. The effect is explained as a resonance between the periodic cyclotron orbit motion and the oscillating E\ifmmode\times\else\texttimes\fi{}B drift of the orbit center induced by a potential grating.