Metal-insulator transition in disordered 2DEG including temperature effects

TL;DR

This paper investigates the metal-insulator transition in disordered two-dimensional electron gases at finite temperatures by combining electron correlation calculations with scattering rate analysis, aligning well with experimental data.

Contribution

It introduces a self-consistent approach combining STLS and current-relaxation theories to study temperature effects on the metal-insulator transition in 2DEG.

Findings

Identification of a metal-insulator transition at various disorder levels and densities.

Good agreement with recent experimental observations.

Analysis of temperature effects on electron correlations and scattering.

Abstract

We calculate self-consistently the mutual dependence of electron correlations and electron-defect scattering for a two dimensional electron gas at finite temperature. We employ an STLS approach to calculate the electron correlations while the electron scattering rate off Coulombic impurities and surface roughness is calculated using self-consistent current-relaxation theory. The methods are combined and self-consistently solved. We discuss a metal-insulator transition for a range of disorder levels and electron densities. Our results are in good agreement with recent experimental observations.