Fractional microwave-induced resistance oscillations

Details Fractional microwave-induced resistance oscillations Fractional microwave-induced resistance oscillations

2007-11-27

arxiv.org/abs/0711.4249v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 2 figures; Proceedings of EP2DS17 to be published in Physica E; less technical version of arXiv:0707.0990

Scientific paper

10.1016/j.physe.2007.09.003

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 the multiphoton inelastic mechanism. At moderate magnetic field, two single-photon mechanisms become important. One of them is due to resonant series of multiple single-photon transitions, while the other originates from microwave-induced sidebands in the density of states of disorder-broadened Landau levels.

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