Local field correction effects on quasi-particle inelastic scattering rate in a coupled-quantum-layers system at finite temperature

Abstract

Local field correction effects on intra-layer inelastic scattering rate of interacting electrons are theoretically investigated in a coupled-quantum-wells structure, at finite temperature. At first, temperature dependent dynamic dielectric function is calculated using random phase approximation (RPA). Then, local field correction effects are considered in calculations by employing short-range effects of exchange-correlation holes around electrons. We employ Hubbard, finite-temperature Hubbard and STLS approximations. Finally, quasi-particle inelastic scattering rate is calculated using the imaginary part of the electron self-energy within GW method. The results show that quasi-particle inelastic scattering rate is reduced, when a local field correction is employed, at any temperature, wave vector and electron density.