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arXiv · 0707.0990

Theory of the fractional microwave-induced resistance oscillations

I. A. Dmitriev·A. D. Mirlin·D. G. Polyakov
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Abstract

We develop a systematic theory of microwave-induced oscillations in magnetoresistivity of a 2D electron gas in the vicinity of fractional harmonics of the cyclotron resonance, observed in recent experiments. We show that in the limit of well-separated Landau levels the effect is dominated by a change of the distribution function induced by multiphoton processes. At moderate magnetic field, a single-photon mechanism originating from the microwave-induced sidebands in the density of states of disorder-broadened Landau levels becomes important.

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I. A. Dmitriev, A. D. Mirlin, D. G. Polyakov. 2007-11-27. Theory of the fractional microwave-induced resistance oscillations. https://doi.org/10.1103/physrevlett.99.206805

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