Electron-Assisted Hopping in Two Dimensions

Abstract

We have studied the non-ohmic effects in the conductivity of a two-dimensional system which undergoes the crossover from weak to strong localization with decreasing electron concentration. When the electrons are removed from equilibrium with phonons, the hopping conductivity depends only on the electron temperature. This indicates that the hopping transport in a system with a large localization length is assisted by electron-electron interactions rather than by the phonons.

arXiv comment5 pages, 4 figures

References in corpus (6)

• Phonon Emission from a 2D Electron Gas: Evidence of Transition to the Hydrodynamic Regime
• Strong localization of electrons in quasi-one-dimensional conductors
• Statistics of energy spectra of a strongly disordered system of interacting electrons
• Magnetic-Field Dependence of the Localization Length in Anderson Insulators
• Surface plasmon in 2D Anderson insulator with interactions
• Piezoelectric electron-phonon interaction in impure semiconductors: 2D electrons versus composite fermions

Cited by in corpus (17)

• Metal-insulator transition in a weakly interacting many-electron system with localized single-particle states
• Fractal superconductivity near localization threshold
• Jumps in current-voltage characteristics in disordered films
• Giant suppression of the Drude conductivity due to quantum interference in disordered two-dimensional systems
• Evidence of Spatially Inhomogeous Pairing on the Insulating Side of a Disorder-Tuned Superconductor-Insulator Transition
• 1/f Noise in Electron Glasses
• Conductance relaxation in the Electron-Glass; Microwaves versus infra-red response
• Numerical studies of variable-range hopping in one-dimensional systems
• Gate-tunable strong-weak localization transition in few-layer black phosphorus
• Hopping Conductivity Beyond The Percolation Regime Probed By Shot-Noise Measurements
• Nonlinear conductivity of two-dimensional Coulomb glasses
• Universal scaling in disordered systems and non-universal exponents
• Hopping conductivity in heavily doped n-type GaAs layers in the quantum Hall effect regime
• Magnetic field-induced giant enhancement of electron-phonon energy transfer in strongly disordered conductors
• Nonohmic conductivity as a probe of crossover from diffusion to hopping in two dimensions
• Ultrasonic attenuation via energy diffusion channel in disordered conductors
• Nonlinear high-frequency hopping conduction in two-dimensional arrays of Ge-in-Si quantum dots: Acoustic methods