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

TL;DR

This paper investigates how local field corrections influence the inelastic scattering rate of electrons in coupled quantum wells at finite temperature, revealing a consistent reduction in scattering rate with these corrections across various conditions.

Contribution

It introduces a comprehensive theoretical analysis of local field correction effects on electron scattering rates using advanced approximations and the GW method in coupled quantum well systems.

Findings

Local field corrections reduce the inelastic scattering rate at all temperatures.

The reduction is consistent across different wave vectors and electron densities.

The study employs RPA, Hubbard, and STLS approximations for dielectric function calculations.

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.