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Distinct spin and orbital dynamics in Sr2RuO4

Author

Listed:
  • H. Suzuki

    (Max-Planck-Institut für Festkörperforschung
    Tohoku University
    Tohoku University)

  • L. Wang

    (Max-Planck-Institut für Festkörperforschung)

  • J. Bertinshaw

    (Max-Planck-Institut für Festkörperforschung)

  • H. U. R. Strand

    (Örebro University
    Radboud University)

  • S. Käser

    (Max-Planck-Institut für Festkörperforschung
    Friedrich-Alexander-University (FAU) of Erlangen-Nürnberg)

  • M. Krautloher

    (Max-Planck-Institut für Festkörperforschung)

  • Z. Yang

    (Max-Planck-Institut für Festkörperforschung)

  • N. Wentzell

    (Flatiron Institute, Simons Foundation)

  • O. Parcollet

    (Flatiron Institute, Simons Foundation
    Université Paris-Saclay, CNRS, CEA, Institut de physique théorique)

  • F. Jerzembeck

    (Max Planck Institute for Chemical Physics of Solids)

  • N. Kikugawa

    (National Institute for Materials Science)

  • A. P. Mackenzie

    (Max Planck Institute for Chemical Physics of Solids)

  • A. Georges

    (Flatiron Institute, Simons Foundation
    Collége de France
    Centre de Physique Théorique (CPHT), CNRS, Ecole Polytechnique, IP Paris
    University of Geneva)

  • P. Hansmann

    (Max-Planck-Institut für Festkörperforschung
    Friedrich-Alexander-University (FAU) of Erlangen-Nürnberg
    Max Planck Institute for Chemical Physics of Solids)

  • H. Gretarsson

    (Max-Planck-Institut für Festkörperforschung
    Deutsches Elektronen-Synchrotron DESY)

  • B. Keimer

    (Max-Planck-Institut für Festkörperforschung)

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 L3-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.

Suggested Citation

  • H. Suzuki & L. Wang & J. Bertinshaw & H. U. R. Strand & S. Käser & M. Krautloher & Z. Yang & N. Wentzell & O. Parcollet & F. Jerzembeck & N. Kikugawa & A. P. Mackenzie & A. Georges & P. Hansmann & H. , 2023. "Distinct spin and orbital dynamics in Sr2RuO4," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42804-3
    DOI: 10.1038/s41467-023-42804-3
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    References listed on IDEAS

    as
    1. B. Keimer & S. A. Kivelson & M. R. Norman & S. Uchida & J. Zaanen, 2015. "From quantum matter to high-temperature superconductivity in copper oxides," Nature, Nature, vol. 518(7538), pages 179-186, February.
    2. Rafael M. Fernandes & Amalia I. Coldea & Hong Ding & Ian R. Fisher & P. J. Hirschfeld & Gabriel Kotliar, 2022. "Iron pnictides and chalcogenides: a new paradigm for superconductivity," Nature, Nature, vol. 601(7891), pages 35-44, January.
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