Microwave-induced off-resonance giant magnetoresistance in ultraclean two-dimensional electron systems

Abstract

We report on theoretical studies of a recently discovered strong microwave-induced magnetoresistance peak obtained in ultra-clean two-dimensional electron systems at low temperatures. The most striking feature of such a peak is that it shows up on the second harmonic of the cyclotron resonance and with an amplitude that can reach an order of magnitude larger than the microwave-induced resistance oscillations. We apply the microwave-driven electron orbits model in the ultra-clean scenario. Accordingly, we calculate the elastic scattering rate (charged impurity) which will define the unexpected resonance peak position. We also obtain the inelastic scattering rate (phonon damping), that will be responsible of the large peak amplitude. Calculated results are in good agreement with experiments. These results would be of special interest in nanophotonics; they could lead to the design of novel ultrasensitive microwave detectors.

4 pages, 5 figures,To be published in Physica Status Solidi-rapid research letters

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Cited by in corpus (4)

• Bernstein modes and giant microwave response of two-dimensional electron system
• Theoretical model for negative giant magnetoresistance in ultra-high-mobility 2D electron systems
• Resonance peak shift in the photo-current of ultrahigh-mobility two-dimensional electron systems
• Radiation-induced re-emission in a 2D electron system