We present a novel derivation of resonant inelastic x-ray scattering (RIXS) which yields an expression for the RIXS cross section in terms of emission pathways between intermediate and final many-body states. Thereby electron-hole interactions are accounted for, as obtained from full diagonalization of the Bethe-Salpeter equation within an all-electron first-principles framework. We demonstrate our approach with the emission spectra of the fluorine K edge in LiF, and provide an in-depth analysis of the pathways that determine the spectral shape. Excitoninc effects are shown to play a crucial role in both the valence and core regime.
@article{arxiv.2002.12876,
title = {Excitation Pathways in Resonant Inelastic X-Ray Scattering of Solids},
author = {Christian Vorwerk and Francesco Sottile and Claudia Draxl},
journal= {arXiv preprint arXiv:2002.12876},
year = {2020}
}