Evidence for exhaustion in the conductivity of the infinite-dimensional periodic Anderson model

TL;DR

This paper uses Monte Carlo-maximum entropy methods to study the optical conductivity of the infinite-dimensional periodic Anderson model, revealing anomalies linked to conduction-band exhaustion and temperature-dependent spectral features.

Contribution

It provides new insights into the conductivity behavior and spectral anomalies of the model, highlighting the effects of conduction-band exhaustion and temperature on optical properties.

Findings

Optical conductivity shows anomalies related to conduction-band exhaustion.

Drude weight increases with temperature, transferring spectral weight from mid-IR peak.

Resistivity exhibits a non-universal peak and features indicative of impurity physics and Fermi liquid formation.

Abstract

Monte Carlo-maximum entropy calculations of the conductivity of the infinite-dimensional periodic Anderson model are presented. We show that the optical conductivity displays anomalies associated with the exhaustion of conduction-band states near the Fermi energy including a Drude weight which rises with temperature, with weight transferred from a temperature and doping-dependent mid-IR peak and a low-frequency incoherent contribution. Both the Drude and mid-IR peaks persist up to very high temperatures. The resistivity displays a non-universal peak and two other regions associated with impurity-like physics at high temperatures and Fermi Liquid formation at low T.