Giant Magnetoresistance Oscillations Induced by Microwave Radiation and a Zero-Resistance State in a 2D Electron System with a Moderate Mobility

Abstract

The effect of a microwave field in the frequency range from 54 to 140 $\mathrm{GHz}$ on the magnetotransport in a GaAs quantum well with AlAs/GaAs superlattice barriers and with an electron mobility no higher than $10^6$ $\mathrm{c}{\mathrm{m}}^2/Vs$ is investigated. In the given two-dimensional system under the effect of microwave radiation, giant resistance oscillations are observed with their positions in magnetic field being determined by the ratio of the radiation frequency to the cyclotron frequency. Earlier, such oscillations had only been observed in GaAs/AlGaAs heterostructures with much higher mobilities. When the samples under study are irradiated with a 140-$\mathrm{GHz}$ microwave field, the resistance corresponding to the main oscillation minimum, which occurs near the cyclotron resonance, appears to be close to zero. The results of the study suggest that a mobility value lower than $10^6$ $\mathrm{c}{\mathrm{m}}^2/Vs$ does not prevent the formation of zero-resistance states in magnetic field in a two-dimensional system under the effect of microwave radiation.

4 pages, 2 figure

References in corpus (2)

• Theory of microwave-induced oscillations in the magnetoconductivity of a 2D electron gas
• Radiation-induced oscillatory magnetoresistance as a sensitive probe of the zero-field spin splitting in high mobility GaAs/AlGaAs devices

Cited by in corpus (8)

• Mechanisms of the microwave photoconductivity in 2D electron systems with mixed disorder
• Temperature Dependence of Microwave Photoresistance in 2D Electron Systems
• Role of electron-electron interactions in nonlinear transport in 2D electron systems
• Microwave Photoresistance in dc-driven 2D Systems at Cyclotron Resonance Subharmonics
• Nonlinear resistance of 2D electrons in crossed electric and magnetic fields
• Synchnonization, zero-resistance states and rotating Wigner crystal
• Theory of the microwave-induced photocurrent and photovoltage magnetooscillations in a spatially non-uniform 2D electron gas
• Nonlinear magnetoresistance of an irradiated two-dimensional electron system