On the optical conductivity of Electron-Doped Cuprates I: Mott Physics

TL;DR

This paper investigates the optical conductivity of electron-doped cuprates, revealing strong correlations similar to hole-doped counterparts, and highlights discrepancies between optical and photoemission data suggesting complex many-body effects.

Contribution

It provides a detailed analysis of doping and temperature effects on optical conductivity and introduces a quasiparticle scattering model with implications for Landau parameters.

Findings

Materials are strongly correlated, akin to hole-doped cuprates.

The optical spectrum fits a quasiparticle scattering model.

Discrepancies with photoemission data suggest complex doping-dependent interactions.

Abstract

The doping and temperature dependent conductivity of electron-doped cuprates is analysed. The variation of kinetic energy with doping is shown to imply that the materials are approximately as strongly correlated as the hole-doped materials. The optical spectrum is fit to a quasiparticle scattering model; while the model fits the optical data well, gross inconsistencies with photoemission data are found, implying the presence of a large, strongly doping dependent Landau parameter.