Optical properties of an interacting large polaron gas

TL;DR

This paper investigates the optical properties of an interacting large polaron gas, analyzing how conductivity and absorption vary with charge density, temperature, and electron-phonon coupling, revealing similarities to cuprate infrared spectra.

Contribution

It provides a theoretical calculation of the normal state conductivity of large polarons using the Random Phase approximation, with numerical results and analysis of optical absorption features.

Findings

Conductivity exhibits features similar to cuprate infrared spectra.

Optical absorption varies with charge density and temperature.

The behavior depends on the electron-phonon coupling constant.

Abstract

The normal state conductivity of a system of interacting large polarons is calculated within the Random Phase approximation and some numerical results are presented. The behaviour of the optical absorption as a function of the charge carrier density and of the temperature is analyzed for different values of the electron-phonon coupling constant. It is shown that the conductivity exihibits features similar to thos observed in the infrared spectra of the cuprates.