Fermi-liquid behaviour of the low-density 2D hole gas in GaAs/AlGaAs heterostructure at large values of r_s

Abstract

We examine the validity of the Fermi-liquid description of the dilute 2D hole gas in the crossover from 'metallic'-to-'insulating' behaviour of R(T).It has been established that, at r_s as large as 29, negative magnetoresistance does exist and is well described by weak localisation. The dephasing time extracted from the magnetoresistance is dominated by the T^2 -term due to Landau scattering in the clean limit. The effect of hole-hole interactions, however, is suppressed when compared with the theory for small r_s.

4 pages ReVTeX, 4 ps figures

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Cited by in corpus (15)

• Hole-Hole Interaction Effect in the Conductance of the Two-Dimensional Hole Gas in the Ballistic Regime
• Electron-electron interactions in the conductivity of graphene
• The so-called two dimensional metal-insulator transition
• Interaction corrections to the Hall coefficient at intermediate temperatures
• Interplay between interferences and electron-electron interactions in epitaxial graphene
• Thermodynamic density of states of two-dimensional GaAs systems near the apparent metal-insulator transition
• Magnetoresistance and dephasing in a two-dimensional electron gas at intermediate conductances
• On the Cooling of Electrons in a Silicon Inversion Layer
• The metallic resistance of a dilute two-dimensional hole gas in a GaAs quantum well: two-phase separation at finite temperature?
• Quantum decoherence of interacting electrons in arrays of quantum dots and diffusive conductors
• In-Plane Magnetodrag between Dilute Two-Dimensional Systems
• Novel Energy Scale in the Interacting 2D Electron System Evidenced from Transport and Thermodynamic Measurements
• Quantum phase transitions in two-dimensional systems
• The Parallel Magnetoconductance of Interacting Electrons in a Two Dimensional Disordered System
• Interactions in high-mobility 2D electron and hole systems