Radiation-induced magnetoresistance oscillations in two-dimensional electron systems under bichromatic irradiation

Abstract

We analyze the magnetoresistance $R_{xx}$ oscillations in high-mobility two-dimensional electron systems induced by the combined driving of two radiation fields of frequency ${\omega }_1$ and ${\omega }_2$, based on the balance-equation approach to magnetotransport for high-carrier-density systems in Faraday geometry. It is shown that under bichromatic irradiation of ${\omega }_2\sim 1.5{\omega }_1$, most of the characterstic peak-valley pairs in the curve of $R_{xx}$ versus magnetic field in the case of monochromatic irradiation of either ${\omega }_1$ or ${\omega }_2$ disappear, except the one around ${\omega }_1/{\omega }_c\sim 2$ or ${\omega }_2/{\omega }_c\sim 3$. $R_{xx}$ oscillations show up mainly as new peak-valley structures around other positions related to multiple photon processes of mixing frequencies ${\omega }_1+{\omega }_2$, ${\omega }_2-{\omega }_1$, etc. Many minima of these resistance peak-valley pairs can descend down to negative with enhancing radiation strength, indicating the possible bichromaticzero-resistance states.

5 pages, 3 figures. Accepted for publication in Phys. Rev. B

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• Polarization immunity of magnetoresistivity response under Microwave excitation
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• Magnetoresistivity Modulated Response in Bichromatic Microwave Irradiated Two Dimensional Electron Systems
• Hall field-induced resistance oscillations in tilted magnetic fields
• Hall magnetoresistivity response under Microwave excitation revisited
• Theory of the microwave-induced photocurrent and photovoltage magnetooscillations in a spatially non-uniform 2D electron gas
• Magnetoresistance oscillations in two-dimensional electron systems under monochromatic and bichromatic radiations
• Microwave photoresistance in a two-dimensional electron gas with separated Landau levels
• Phase of phonon-induced resistance oscillations in a high-mobility two-dimensional electron gas
• Phase-sensitive bichromatic photoresistance in a two-dimensional electron gas