Metal-insulator transition in a disordered two-dimensional electron gas including temperature effects

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 a Singwi, Tosi, Land, and Sj\"olander 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.