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  High-Resolution Photoemission on Sr2RuO4 Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies

Tamai, A., Zingl, M., Rozbicki, E., Cappelli, E., Riccò, S., de la Torre, A., et al. (2019). High-Resolution Photoemission on Sr2RuO4 Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies. Physical Review X, 9(2): 021048, pp. 1-18. doi:10.1103/PhysRevX.9.021048.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-DFDE-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-E045-2
Genre: Journal Article

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 Creators:
Tamai, A.1, Author
Zingl, M.1, Author
Rozbicki, E.1, Author
Cappelli, E.1, Author
Riccò, S.1, Author
de la Torre, A.1, Author
Walker, S. McKeown1, Author
Bruno, F. Y.1, Author
King, P. D. C.1, Author
Meevasana, W.1, Author
Shi, M.1, Author
Radović, M.1, Author
Plumb, N. C.1, Author
Gibbs, A. S.1, Author
Mackenzie, A. P.2, Author              
Berthod, C.1, Author
Strand, H. U. R.1, Author
Kim, M.1, Author
Georges, A.1, Author
Baumberger, F.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863463              

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 Abstract: We explore the interplay of electron-electron correlations and spin-orbit coupling in the model Fermi liquid Sr2RuO4 using laser-based angle-resolved photoemission spectroscopy. Our precise measurement of the Fermi surface confirms the importance of spin-orbit coupling in this material and reveals that its effective value is enhanced by a factor of about 2, due to electronic correlations. The self-energies for the beta and y sheets are found to display significant angular dependence. By taking into account the multi-orbital composition of quasiparticle states, we determine self-energies associated with each orbital component directly from the experimental data. This analysis demonstrates that the perceived angular dependence does not imply momentum-dependent many-body effects but arises from a substantial orbital mixing induced by spin-orbit coupling. A comparison to single-site dynamical mean-field theory further supports the notion of dominantly local orbital self-energies and provides strong evidence for an electronic origin of the observed nonlinear frequency dependence of the self-energies, leading to "kinks" in the quasiparticle dispersion of Sr2RuO4.

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Language(s): eng - English
 Dates: 2019-06-062019-06-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevX.9.021048
 Degree: -

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Title: Physical Review X
  Abbreviation : Phys. Rev. X
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 9 (2) Sequence Number: 021048 Start / End Page: 1 - 18 Identifier: Other: 2160-3308
CoNE: https://pure.mpg.de/cone/journals/resource/2160-3308