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Radiation-Induced Magnetoresistance Oscillations in a 2D Electron Gas

Adam C. Durst·Subir Sachdev·N. Read·S. M. Girvin
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Abstract

Recent measurements of a 2D electron gas subjected to microwave radiation reveal a magnetoresistance with an oscillatory dependence on the ratio of radiation frequency to cyclotron frequency. We perform a diagrammatic calculation and find radiation-induced resistivity oscillations with the correct period and phase. Results are explained via a simple picture of current induced by photo-excited disorder-scattered electrons. The oscillations increase with radiation intensity, easily exceeding the dark resistivity and resulting in negative-resistivity minima. At high intensity, we identify additional features, likely due to multi-photon processes, which have yet to be observed experimentally.

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Adam C. Durst, Subir Sachdev, N. Read, S. M. Girvin. 2003-08-25. Radiation-Induced Magnetoresistance Oscillations in a 2D Electron Gas. https://doi.org/10.1103/physrevlett.91.086803

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