The effect of screening long-range Coulomb interactions on the metallic behavior in two-dimensional hole systems

Abstract

We have developed a technique utilizing a double quantum well heterostructure that allows us to study the effect of a nearby ground-plane on the metallic behavior in a GaAs two-dimensional hole system (2DHS) in a single sample and measurement cool-down, thereby maintaining a constant disorder potential. In contrast to recent measurements of the effect of ground-plane screening of the long-range Coulomb interaction in the insulating regime, we find surprisingly little effect on the metallic behavior when we change the distance between the 2DHS and the nearby ground-plane.

5 pages, 4 figures, accepted for publication in PRB

References in corpus (10)

• Metal-insulator transition in two-dimensional electron systems
• Interaction corrections at intermediate temperatures: I. Longitudinal conductivity and kinetic equation
• Hole-Hole Interaction Effect in the Conductance of the Two-Dimensional Hole Gas in the Ballistic Regime
• Metal-insulator transition in 2D: resistance in the critical region
• Interaction Corrections to Two-Dimensional Hole Transport in Large $r_s$ Limit
• Calculated temperature-dependent resistance in low density 2D hole gases in GaAs heterostructure
• Thermodynamic density of states of two-dimensional GaAs systems near the apparent metal-insulator transition
• On the metallic behaviour in dilute two-dimensional systems
• Coulomb Drag near the metal-insulator transition in two-dimensions
• Interaction Correction to the Longitudinal Conductivity and Hall Resistivity in High Quality Two-Dimensional GaAs Electron and Hole Systems

Cited by in corpus (7)

• Velocity-modulation control of electron-wave propagation in graphene
• Critical Behavior of a Strongly Disordered 2D Electron System: The Cases of Long-Range and Screened Coulomb Interactions
• Possible effect of collective modes in zero magnetic field transport in an electron-hole bilayer
• Ground-plane screening of Coulomb interactions in two-dimensional systems: How effectively can one two-dimensional system screen interactions in another?
• A simple variational method for calculating energy and quantum capacitance of an electron gas with screened interactions
• The origin of gate hysteresis in p-type Si-doped AlGaAs/GaAs heterostructures
• Temperature-dependent Drude transport in a two-dimensional electron gas