Distinct spin and orbital dynamics in Sr2RuO4

Suzuki H, Wang L, Bertinshaw J, Strand HU, Käser S, Krautloher M, Yang Z, Wentzell N, Parcollet O, Jerzembeck F, Kikugawa N, Mackenzie AP, Georges A, Hansmann P, Gretarsson H, Keimer B (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Nature Communications Nature Publishing Group: Nature Communications

Book Volume: 14

Article Number: 7042

Journal Issue: 1

DOI: 10.1038/s41467-023-42804-3

Abstract

The unconventional superconductor Sr2RuO4 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 L 3-edge resonant inelastic x-ray scattering to obtain comprehensive maps of the electronic excitations of Sr2RuO4 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 Sr2RuO4 and provide key information for the understanding of its unconventional superconductivity.

Authors with CRIS profile

Stefan Käser Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien Philipp Hansmann Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien

Involved external institutions

Max-Planck-Institut für Festkörperforschung DE Germany (DE) Örebro University SE Sweden (SE) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Simons Foundation US United States (USA) (US) National Institute of Materials Science (NIMS) JP Japan (JP)

How to cite

APA:

Suzuki, H., Wang, L., Bertinshaw, J., Strand, H.U., Käser, S., Krautloher, M.,... Keimer, B. (2023). Distinct spin and orbital dynamics in Sr2RuO4. Nature Communications, 14(1). https://doi.org/10.1038/s41467-023-42804-3

MLA:

Suzuki, H., et al. "Distinct spin and orbital dynamics in Sr2RuO4." Nature Communications 14.1 (2023).

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