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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Bibliographic Details
Published in:Physical review letters 2010-05, Vol.104 (20), p.206801-206801, Article 206801
Main Authors: Khodas, M, Chiang, H-S, Hatke, A T, Zudov, M A, Vavilov, M G, Pfeiffer, L N, West, K W
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CYCLOTRON RESONANCE
ELECTRIC FIELDS
ELECTRONS
HARMONICS
KINETICS
MAGNETORESISTANCE
MATHEMATICAL MODELS
MICROWAVE RADIATION
MULTI-PHOTON PROCESSES
OSCILLATIONS
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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:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.104.206801