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Transition to Zero Resistance in a Two Dimensional Electron Gas Driven with Microwaves by Alicea, J.; Balents, L.; Fisher, M. P. A.; Paramekanti, A.; Radzihovsky, L. is a scholarly article available to read on EtoBox.

What is Transition to Zero Resistance in a Two Dimensional Electron Gas Driven with Microwaves about?

High-mobility 2D electron systems in a perpendicular magnetic field exhibit zero resistance states (ZRS) when driven with microwave radiation. We study the nonequilibrium phase transition into this ZRS using phenomenological equations of motion to describe the current and density fluctuations. We focus on two models for the transition into a time-independent steady state. Model-I assumes rotational invariance, density conservation, and symmetry under shifting the density globally by a constant. This model is argued to describe physics on small length scales where the density does not vary appreciably from its mean. The ordered state that arises in this case breaks rotational invariance and consists of a uniform current and transverse Hall field. We discuss some properties of this state, such as stability to fluctuations and the appearance of a Goldstone mode associated with the continuous symmetry breaking. Using dynamical renormalization group techniques, we find that with short-range interactions this model can admit a continuous transition described by mean-field theory, whereas with long-range interactions the transition is driven first-order. Model-II, which assumes only rotat

Author

Alicea, J.; Balents, L.; Fisher, M. P. A.; Paramekanti, A.; Radzihovsky, L.

Published

2004

Language

EN