Nonresonant Raman Scattering in Extremely Correlated Fermi Liquids

TL;DR

This paper uses the extremely correlated Fermi liquid theory to calculate optical and Raman responses in a 2D t-t'-J model, providing insights for interpreting experiments on strongly correlated materials.

Contribution

It introduces a theoretical framework for non-resonant Raman susceptibilities in the t-t'-J model, emphasizing the effects of model parameters on dynamical responses.

Findings

Susceptibilities depend sensitively on t and t' parameters.

Provides a comprehensive analysis of polarization geometries.

Offers a framework for future experimental interpretation.

Abstract

We present theoretical results for the optical conductivity and the non-resonant Raman susceptibilities for three principal polarization geometries relevant to the square lattice. The susceptibilities are obtained using the recently developed extremely correlated Fermi liquid theory for the two-dimensional t-t'-J model, where t and t' are the nearest and second neighbor hopping. Our results are sensitively depending on t, t'. By studying this quartet of related dynamical susceptibilities, and their dependence on t, t', doping and temperature, we provide a useful framework for interpreting and planning future Raman experiments on the strongly correlated matter.