Sommaire:

Nearly 20 years ago Zudov et al. experimentally discovered huge microwave-induced resistance oscillations (MIRO) in high-mobility two-dimensional electron gas at low temperatures and moderate magnetic fields. This spectacular phenomenon has attracted a lot of interest. The mainstream theories describe MIRO as a quantum phenomenon and deal with quantum transitions between Landau levels in the presence of different types of disorder. In contrast, we show that MIRO is a purely classical memory effect caused by re-collisions of electrons with scattering centers after a cyclotron period. We develop a novel Drude-like approach to magneto-transport in presence of a microwave field, taking account of memory effects, and find an excellent agreement between numerical simulations, analytical results, and experiment.

Pour plus d'informations, merci de contacter Berthier L.