Theory of the fractional microwave-induced resistance oscillations

Details Theory of the fractional microwave-induced resistance oscillations Theory of the fractional microwave-induced resistance oscillations

2007-07-06

arxiv.org/abs/0707.0990v2

Phys. Rev. Lett. 99, 206805 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures; V2: published version (typos corrected, references added and updated)

Scientific paper

10.1103/PhysRevLett.99.206805

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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