Giant microwave photoresistivity in a high-mobility quantum Hall system

Details Giant microwave photoresistivity in a high-mobility quantum Hall system Giant microwave photoresistivity in a high-mobility quantum Hall system

2011-05-06

arxiv.org/abs/1105.1390v1

Physical Review B 83, 121301(R) (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.83.121301

We report the observation of a remarkably strong microwave photoresistivity effect in a high-mobility two-dimensional electron system subject to a weak magnetic field and low temperature. The effect manifests itself as a giant microwave-induced resistivity peak which, in contrast to microwave-induced resistance oscillations, appears only near the second harmonic of the cyclotron resonance and only at sufficiently high microwave frequencies. Appearing in the regime linear in microwave intensity, the peak can be more than an order of magnitude stronger than the microwave-induced resistance oscillations and cannot be explained by existing theories.

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