Microwave photoconductivity of a 2D electron gas: Mechanisms and their interplay at high radiation power

Abstract

We develop a systematic theory of microwave-induced oscillations in the magnetoresistivity of a two-dimensional electron gas, focusing on the regime of strongly overlapping Landau levels. At linear order in microwave power, two novel mechanisms of the oscillations (``quadrupole'' and ``photovoltaic'') are identified, in addition to those studied before (``displacement'' and ``inelastic''). The quadrupole and photovoltaic mechanisms are shown to be the only ones that give rise to oscillations in the nondiagonal part of the photoconductivity tensor. In the diagonal part, the inelastic contribution dominates at moderate microwave power, while at elevated power the other mechanisms become relevant. We demonstrate the crucial role of feedback effects, which lead to a strong interplay of the four mechanisms in the nonlinear photoresponse and yield, in particular, a nonmonotonic power dependence of the photoconductivity, narrowing of the magnetoresonances, and a nontrivial structure of the Hall photoresponse. At ultrahigh power, all effects related to the Landau quantization decay due to a combination of the feedback and multiphoton effects, restoring the classical Drude conductivity.

26 pages, 10 figures. V2: published version (typos corrected, references updated)

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Cited by in corpus (32)

• Mechanisms of the microwave photoconductivity in 2D electron systems with mixed disorder
• Nonlinear growth with the microwave intensity in radiation-induced magnetoresistance oscillations
• Temperature Dependence of Microwave Photoresistance in 2D Electron Systems
• Observation of linear-polarization-sensitivity in the microwave-radiation-induced magnetoresistance oscillations
• Interference oscillations of microwave photoresistance in double quantum wells
• Giant microwave photoresistivity in a high-mobility quantum Hall system
• Phase study of oscillatory resistances in microwave-irradiated- and dark- GaAs/AlGaAs devices: Indications of a new class of integral quantum Hall effect
• Microwave zero-resistance states in a bilayer electron system
• Role of electron-electron interactions in nonlinear transport in 2D electron systems
• Effect of microwave radiation on non-linear resistivity of a two-dimensional electron gas at large filling factors
• Non-linear magnetotransport in microwave-illuminated two-dimensional electron systems
• Theory of the fractional microwave-induced resistance oscillations
• Microwave Photoresistance in dc-driven 2D Systems at Cyclotron Resonance Subharmonics
• Nonlinear resistance of 2D electrons in crossed electric and magnetic fields
• Theory of the microwave-induced photocurrent and photovoltage magnetooscillations in a spatially non-uniform 2D electron gas
• Crossover between distinct mechanisms of microwave photoresistance in bilayer systems
• Nonlinear theory of fractional microwave-induced magnetoresistance oscillations in a dc-driven two-dimensional electron system
• Phonon-induced resistance oscillations of two-dimensional electron systems drifting with supersonic velocities
• Non-linear response of a high mobility two-dimensional electron system near the second harmonic of the cyclotron resonance
• Nonlinear magnetoresistance of an irradiated two-dimensional electron system
• High order fractional microwave induced resistance oscillations in 2D systems
• Effect of parallel magnetic field on the Zero Differential Resistance State
• Magnetotransport of electrons in quantum Hall systems
• Fine structure of high-power microwave-induced resistance oscillations
• Magneto-oscillations due to electron-electron interactions in the ac conductivity of a 2D electron gas
• Multiphoton processes at cyclotron resonance subharmonics in a 2D electron system under DC and microwave excitation
• Magnetocapacitance oscillations and thermoelectric effect in two-dimensional electron gas irradiated by microwaves
• Excitation of plasmons in two-dimensional electron gas with defects by microwaves: Wake-field method
• Microwave induced nonlocal transport in two-dimensional electron system
• Fractional microwave-induced resistance oscillations
• Simultaneous Measurements of Microwave Photoresistance and Cyclotron Reflection in the Multi-Photon Regime
• Oscillatory photoresistance on the high field side of the cyclotron resonance