Giant microwave photoresistance of two-dimensional electron gas

Details Giant microwave photoresistance of two-dimensional electron gas Giant microwave photoresistance of two-dimensional electron gas

2001-06-09

arxiv.org/abs/cond-mat/0106181v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1063/1.1408910

We measure microwave frequency (4-40 GHz) photoresistance at low magnetic field B, in high mobility 2D electron gas samples, excited by signals applied to a transmission line fabricated on the sample surface. Oscillatory photoresistance vs B is observed. For excitation at the cyclotron resonance frequency, we find an unprecedented, giant relative photoresistance (\Delta R)/R of up to 250 percent. The photoresistance is apparently proportional to the square root of applied power, and disappears as the temperature is increased.

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