We present a computational study of resonant inelastic x-ray scattering (RIXS) and x-ray absorption in a representative rare-earth nickelate LuNiO3. We study the changes in the spectra across the metal-insulator/site-disproportionation transition. In particular, we address the question of site-selectivity of the two methods in the disproportionated insulating phase and the signature of metal-insulator transition in the fluorescence-like feature of the RIXS spectra. To this end we use the local density approximation + dynamical mean-field theory (LDA+DMFT) approach combined with configuration integration method to compute the core-level spectra.
@article{arxiv.2004.01428,
title = {X-ray spectroscopy of rare-earth nickelate LuNiO$_3$: LDA+DMFT study},
author = {Mathias Winder and Atsushi Hariki and Jan Kuneš},
journal= {arXiv preprint arXiv:2004.01428},
year = {2020}
}