Resonant inelastic x-ray scattering operators for $t_{2g}$ orbital systems
Abstract
We derive general expressions for resonant inelastic x-ray scattering (RIXS) operators for orbital systems, which exhibit a rich array of unconventional magnetism arising from unquenched orbital moments. Within the fast collision approximation, which is valid especially for 4 and 5 transition metal compounds with short core-hole lifetimes, the RIXS operators are expressed in terms of total spin and orbital angular momenta of the constituent ions. We then map these operators onto pseudospins that represent spin-orbit entangled magnetic moments in systems with strong spin-orbit coupling. Applications of our theory to such systems as iridates and ruthenates are discussed, with a particular focus on compounds based on ions with Van Vleck-type nonmagnetic ground state.
Keywords
Cite
@article{arxiv.1705.00215,
title = {Resonant inelastic x-ray scattering operators for $t_{2g}$ orbital systems},
author = {B. J. Kim and Giniyat Khaliullin},
journal= {arXiv preprint arXiv:1705.00215},
year = {2017}
}