Radiation-induced magnetotransport in high-mobility two-dimensional systems: Role of electron heating

Abstract

Effects of microwave radiation on magnetoresistance are analyzed in a balance-equation scheme that covers regimes of inter- and intra-Landau level processes and takes account of photon-asissted electron transitions as well as radiation-induced change of the electron distribution for high mobility two-dimensional systems. Short-range scatterings due to background impurities and defects are shown to be the dominant direct contributors to the photoresistance oscillations. The electron temperature characterizing the system heating due to irradiation, is derived by balancing the energy absorption from the radiation field and the energy dissipation to the lattice through realistic electron-phonon couplings, exhibiting resonant oscillation. Microwave modulations of Shubnikov de Haas oscillation amplitude are produced together with microwave-induced resistance oscillations, in agreement with experimental findings. In addition, the suppression of the magnetoresistance caused by low-frequency radiation in the higher magnetic field side is also demonstrated.

10 pages, 7 figures, published version

References in corpus (3)

• 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

Cited by in corpus (9)

• Mechanisms of the microwave photoconductivity in 2D electron systems with mixed disorder
• Microwave photoconductivity of a 2D electron gas: Mechanisms and their interplay at high radiation power
• Phase study of oscillatory resistances in microwave-irradiated- and dark- GaAs/AlGaAs devices: Indications of a new class of integral quantum Hall effect
• 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
• Low temperature electron-phonon resonance in dc-current-biased two-dimensional electron systems
• Nonlinear theory of fractional microwave-induced magnetoresistance oscillations in a dc-driven two-dimensional electron system
• Direct-current control of radiation-induced differential magnetoresistance oscillations in two-dimensional electron systems
• Nonlinear magnetoresistance of an irradiated two-dimensional electron system