| Autor: |
Suzuki, H., Wang, L., Bertinshaw, J., Strand, H. U. R., Käser, S., Krautloher, M., Yang, Z., Wentzell, N., Parcollet, O., Jerzembeck, F., Kikugawa, N., Mackenzie, A. P., Georges, A., Hansmann, P., Gretarsson, H., Keimer, B. |
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| Zdroj: |
Nature Communications; 11/3/2023, Vol. 14 Issue 1, p1-7, 7p |
| Abstrakt: |
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. The authors present resonant inelastic x-ray scattering measurements of Sr2RuO4 in the normal Fermi-liquid state. They find that spin excitations are confined below 200 meV, while orbital fluctuations appear only at higher energies. This separation of energy scales is a hallmark of Hund's-rule-induced electron correlations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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