Optical Conductivity in a Simple Model of Pseudogap State in Two-Dimensional System

TL;DR

This paper models the optical conductivity in a 2D system with pseudogap features, showing how hot patches on the Fermi surface cause non-Fermi-liquid behavior that aligns with experimental observations in copper oxides.

Contribution

It introduces a simple model with hot patches on the Fermi surface to explain pseudogap phenomena and optical anomalies in two-dimensional systems.

Findings

Qualitative reproduction of optical experiment anomalies

Non-Fermi-liquid spectral density renormalization

Model captures key pseudogap features in copper oxides

Abstract

We present calculation of optical conductivity in a simple model of electronic spectrum of two-dimensional system with "hot patches" on the Fermi surface, leading to non Fermi-liquid renormalization of the spectral density (pseudogap) on these patches. It is shown that this model qualitatively reproduces basic anomalies of optical experiments in the pseudogap state of copper oxides.