Optical Conductivity in the Copper Oxide Materials

TL;DR

This paper investigates the optical conductivity of copper oxide materials using the t-J model, revealing unusual low-energy behavior and temperature-dependent midinfrared peaks that diminish at higher temperatures.

Contribution

It provides a theoretical analysis of optical conductivity in copper oxides, highlighting temperature effects on midinfrared spectral features within the t-J model.

Findings

Unusual low-energy optical conductivity behavior.

Midinfrared peak diminishes with increasing temperature.

Peak vanishes at higher temperatures.

Abstract

The frequency- and temperature-dependent optical conductivity of the copper oxide materials in the underdoped and optimal doped regimes are studied within the t-J model. The conductivity spectrum shows the unusual behavior at low energies and anomalous midinfrared peak in the low temperatures. However, this midinfrared peak is severely depressed with increasing temperatures, and vanishes at higher temperatures.