On the c-axis optical reflectivity of layered cuprate superconductors

TL;DR

This paper models the c-axis optical reflectivity of layered cuprate superconductors using a BCS-Fermi liquid approach, achieving good agreement with experimental data by incorporating measured normal state resistivities.

Contribution

It introduces a microscopic, self-consistent gauge invariant formalism to calculate the c-axis optical properties of high-temperature cuprates, linking resistivity measurements to optical response.

Findings

Good semi-quantitative agreement with experimental data

Normal state resistivities effectively inform the model parameters

Microscopic calculation captures key optical features of cuprates

Abstract

Using a conventional BCS -- Fermi liquid model we calculate the c-axis optical reflectivity of the layered high temperature cuprate superconductors by obtaining the finite temperature dynamical dielectric function in a microscopic self-consistent gauge invariant formalism. We get good semi-quantitative agreement with all the existing experimental data by using the measured normal state $dc$ resistivities as the input parameters in obtaining the c-axis hopping amplitude and the normal state level broadening in our microscopic calculation.