Density dependence of microwave induced magneto-resistance oscillations in a two-dimensional electron gas

Abstract

We have measured the magneto-resistance of a two-dimensional electron gas (2DEG) under continuous microwave irradiation as a function of electron density and mobility tuned with a metallic top-gate. In the entire range of density and mobility we have investigated, we observe microwave induced oscillations of large amplitude that are B-periodic. These B-periodic oscillations are reminiscent of the ones reported by Kukushkin \textit{et al}[1] and which were attributed to the presence of edge-magneto-plasmons. We have found that the B-periodicity does not increase linearly with the density in our sample but shows a plateau in the range (2.4-3) 10^{11}\rm cm^{-2} $. In this regime, the phase of the B-periodic oscillations is found to shift continuously by two periods.

arXiv comment5 pages, 4 figures

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• Sub-linear radiation power dependence of photo-excited resistance oscillations in two-dimensional electron systems
• Effect of rotation of the polarization of linearly polarized microwaves on the radiation-induced magnetoresistance oscillations
• Microwave-induced electron heating in the regime of radiation-induced magnetoresistance oscillations
• Magneto-transport characteristics of a 2D electron system driven to negative magneto-conductivity by microwave photoexcitation
• Combined study of microwave-power/linear-polarization dependence of the microwave-radiation-induced magnetoresistance oscillations in GaAs/AlGaAs devices
• Comparative study of microwave radiation-induced magnetoresistive oscillations induced by circularly- and linearly- polarized photo-excitation
• Photovoltaic Oscillations Due to Edge-Magnetoplasmon Modes in a Very-High Mobility 2D Electron Gas
• Remotely sensed transport in microwave photoexcited GaAs/AlGaAs two-dimensional electron system
• Remote sensor response study in the regime of the microwave radiation-induced magnetoresistance oscillations
• Linear polarization study of microwave-radiation-induced magnetoresistance oscillations: Comparison of power dependence to theory
• Evolution of the linear-polarization-angle-dependence of the radiation-induced magnetoresistance-oscillations with microwave power
• Fermi Liquid Model of Radiation Induced Magnetoresistance Oscillations in GaAs/Al${}_x$Ga${}_{1-x}$As Heterostructure Two-Dimensional Electron System: Theoretical Evidence of an Electron Reservoir
• Photovoltage Detection of Edge Magnetoplasmon Oscillations and Giant Magnetoplasmon Resonances in A Two-Dimensional Hole System