We characterize experimentally and theoretically the high-energy dielectric screening properties of the prototypical correlated metal SrVO3. The dynamical structure factor measured by inelastic x-ray scattering spectroscopy as a function of momentum transfer is in very good agreement with first-principles calculations in the adiabatic local density approximation to time-dependent density-functional theory. Our results reveal the crucial importance of crystal local fields in the charge response function of correlated materials: They lead to depolarization effects for localised excitations and couple spectra from different Brillouin zones.
@article{arxiv.2106.05715,
title = {Dynamical screening in SrVO$_3$: Inelastic x-ray scattering experiments and ab initio calculations},
author = {Kari Ruotsalainen and Alessandro Nicolaou and Christoph J. Sahle and Anna Efimenko and James M. Ablett and Jean-Pascal Rueff and Dharmalingam Prabhakaran and Matteo Gatti},
journal= {arXiv preprint arXiv:2106.05715},
year = {2021}
}