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

References in corpus (4)

• Theory of microwave-induced oscillations in the magnetoconductivity of a 2D electron gas
• Observation of Apparently Zero-Conductance States in Corbino Samples
• Radiation-Induced "Zero-Resistance State" and the Photon Assisted Transport
• Radiation-induced magnetotransport in high-mobility two-dimensional systems: Role of electron heating

Cited by in corpus (8)

• Mechanisms of the microwave photoconductivity in 2D electron systems with mixed disorder
• Phase study of oscillatory resistances in microwave-irradiated- and dark- GaAs/AlGaAs devices: Indications of a new class of integral quantum Hall effect
• Polarization immunity of magnetoresistivity response under Microwave excitation
• Non-linear magnetotransport in microwave-illuminated two-dimensional electron systems
• Magnetoresistivity Modulated Response in Bichromatic Microwave Irradiated Two Dimensional Electron Systems
• 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