Nonlinear magnetoresistance oscillations in intensely irradiated two-dimensional electron systems induced by multiphoton processes

We report on magneto-oscillations in differential resistivity of a two-dimensional electron system subject to intense microwave radiation. The period of these oscillations is determined not only by microwave frequency but also by its intensity. A theoretical model based on quantum kinetics at high m...

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Published inPhysical review letters Vol. 104; no. 20; p. 206801
Main Authors Khodas, M, Chiang, H-S, Hatke, A T, Zudov, M A, Vavilov, M G, Pfeiffer, L N, West, K W
Format Journal Article
LanguageEnglish
Published United States 21.05.2010
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Summary:We report on magneto-oscillations in differential resistivity of a two-dimensional electron system subject to intense microwave radiation. The period of these oscillations is determined not only by microwave frequency but also by its intensity. A theoretical model based on quantum kinetics at high microwave power captures all important characteristics of this phenomenon which is strongly nonlinear in microwave intensity. Our results demonstrate a crucial role of the multiphoton processes near the cyclotron resonance and its harmonics in the presence of strong dc electric field and offer a unique way to reliably determine the intensity of microwaves acting on electrons.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.104.206801