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Bichromatic Microwave Photoresistance of Two-Dimensional Electron System

M. A. Zudov·R. R. Du·L. N. Pfeiffer·K. W. West
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Abstract

We explore experimentally bichromatic (frequencies $ω_1$ and $ω_2$) photoresistance of a two-dimensional electron system in the regimes of microwave-induced resistance oscillations and zero-resistance states. We find bichromatic resistance to be well described by a superposition of $ω_1$ and $ω_2$ components, provided that both monochromatic resistances are positive. This relation holds even when the oscillation amplitudes are small and one could expect additive contributions from monochromatic photoresistances. In contrast, whenever a zero-resistance state is formed by one of the frequencies, such superposition relation breaks down and the bichromatic resistance is strongly suppressed.

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M. A. Zudov, R. R. Du, L. N. Pfeiffer, K. W. West. 2006-05-19. Bichromatic Microwave Photoresistance of Two-Dimensional Electron System. https://doi.org/10.1103/physrevlett.96.236804

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