Distinct spin and orbital dynamics in Sr$_{2}$RuO$_{4}$
Abstract
The unconventional superconductor SrRuO has long served as a benchmark for theories of correlated-electron materials. The determination of the superconducting pairing mechanism requires detailed experimental information on collective bosonic excitations as potential mediators of Cooper pairing. We have used Ru -edge resonant inelastic x-ray scattering to obtain comprehensive maps of the electronic excitations of SrRuO over the entire Brillouin zone. We observe multiple branches of dispersive spin and orbital excitations associated with distinctly different energy scales. The spin and orbital dynamical response functions calculated within the dynamical mean-field theory are in excellent agreement with the experimental data. Our results highlight the Hund metal nature of SrRuO and provide key information for the understanding of its unconventional superconductivity.
Cite
@article{arxiv.2212.00245,
title = {Distinct spin and orbital dynamics in Sr$_{2}$RuO$_{4}$},
author = {H. Suzuki and L. Wang and J. Bertinshaw and H. U. R. Strand and S. Käser and M. Krautloher and Z. Yang and N. Wentzell and O. Parcollet and F. Jerzembeck and N. Kikugawa and A. P. Mackenzie and A. Georges and P. Hansmann and H. Gretarsson and B. Keimer},
journal= {arXiv preprint arXiv:2212.00245},
year = {2024}
}