# Optical properties of the Holstein-t-J model from dynamical mean-field theory

## TL;DR

This paper uses dynamical mean-field theory to analyze the optical conductivity of a hole in the Holstein-t-J model, explaining experimental features in Nd$_{2-x}$Ce$_x$CuO$_4$ related to polaron formation.

## Contribution

It provides an exact solution for optical conductivity in the infinite connectivity limit of the Holstein-t-J model and applies it to real materials.

## Key findings

- Model explains optical features via magnetic and lattice polarons
- Exact solution for $\sigma(\omega)$ in the infinite connectivity limit
- Application to Nd$_{2-x}$Ce$_x$CuO$_4$ matches experimental data

## Abstract

We employ dynamical mean-field theory to study the optical conductivity $\sigma(\omega)$ of one hole in the Holstein-t-J model. We provide an exact solution for $\sigma(\omega)$ in the limit of infinite connectivity. We apply our analysis to Nd$_{2-x}$Ce$_x$CuO$_4$. We show that our model can explain many features of the optical conductivity in this compounds in terms of magnetic/lattice polaron formation.