Radiation-Induced Magnetoresistance Oscillations in a 2D Electron Gas

Adam C. Durst, Subir Sachdev, N. Read, and S. M. Girvin
Phys. Rev. Lett. 91, 086803 – Published 22 August 2003

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 photoexcited 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 multiphoton processes, which have yet to be observed experimentally.

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  • Received 30 January 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.086803

©2003 American Physical Society

Authors & Affiliations

Adam C. Durst, Subir Sachdev, N. Read, and S. M. Girvin

  • Department of Physics, Yale University, P.O. Box 208120, New Haven, Connecticut 06520-8120, USA

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Issue

Vol. 91, Iss. 8 — 22 August 2003

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