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Fractional microwave-induced resistance oscillations

✍ Scribed by I.A. Dmitriev; A.D. Mirlin; D.G. Polyakov

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
148 KB
Volume
40
Category
Article
ISSN
1386-9477

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✦ Synopsis

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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## Abstract We have studied the bichromatic photoresistance states of a two dimensional electron gas in the regime of microwave induced resistance oscillations. Zudov and coworkers found clear experimental evidence of zero‐resistance states by measuring the bichromatic resistance in a bidimensional