Inelastic X-ray scattering in correlated (Mott) insulators

TL;DR

This paper calculates inelastic X-ray scattering in Mott insulators, revealing how charge excitations disperse and broaden, aligning with experimental observations in materials like Ca2CuO2Cl2.

Contribution

It provides a theoretical calculation of inelastic X-ray scattering in strongly correlated insulators, connecting theory with experimental data.

Findings

Charge transfer peak broadens and disperses across the Brillouin zone.

Low energy peak also broadens and disperses.

Results match experimental observations in specific cuprate materials.

Abstract

We calculate the inelastic light scattering from X-rays, which allows the photon to transfer both energy and momentum to the strongly correlated charge excitations. We find that the charge transfer peak and the low energy peak both broaden and disperse through the Brillouin zone similar to what is seen in experiments in materials like Ca_2 Cu O_2 Cl_2.