Abstract
AbstractIn this work we present a model for the photoconductivity of a two dimensional electron system (2DES) subjected to a magnetic field. The model includes the microwave and Landau contributions in a non‐perturbative exact way, Impurity scattering effects are treated perturbatively. Based on this formalism, we provide a Kubo‐like formula that takes into account the oscillatory Floquet structure of the problem. We discuss results related with the recently discovered zero‐resistance states. It is found that, in agreement with experiment, negative dissipation can only be induced in very high mobility samples. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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