High-Resolution Photoemission on Sr_{2}RuO_{4} Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies
We explore the interplay of electron-electron correlations and spin-orbit coupling in the model Fermi liquid Sr_{2}RuO_{4} 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 rev...
| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2019-06-01
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| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.9.021048 |
| _version_ | 1819031020617334784 |
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| author | A. Tamai M. Zingl E. Rozbicki E. Cappelli S. Riccò A. de la Torre S. McKeown Walker F. Y. Bruno P. D. C. King W. Meevasana M. Shi M. Radović N. C. Plumb A. S. Gibbs A. P. Mackenzie C. Berthod H. U. R. Strand M. Kim A. Georges F. Baumberger |
| author_facet | A. Tamai M. Zingl E. Rozbicki E. Cappelli S. Riccò A. de la Torre S. McKeown Walker F. Y. Bruno P. D. C. King W. Meevasana M. Shi M. Radović N. C. Plumb A. S. Gibbs A. P. Mackenzie C. Berthod H. U. R. Strand M. Kim A. Georges F. Baumberger |
| author_sort | A. Tamai |
| collection | DOAJ |
| description | We explore the interplay of electron-electron correlations and spin-orbit coupling in the model Fermi liquid Sr_{2}RuO_{4} 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 β and γ 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 Sr_{2}RuO_{4}. |
| first_indexed | 2024-12-21T06:39:25Z |
| format | Article |
| id | doaj.art-75d9297f7fe04e00a31c7870fedeafcd |
| institution | Directory Open Access Journal |
| issn | 2160-3308 |
| language | English |
| last_indexed | 2024-12-21T06:39:25Z |
| publishDate | 2019-06-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj.art-75d9297f7fe04e00a31c7870fedeafcd2022-12-21T19:12:46ZengAmerican Physical SocietyPhysical Review X2160-33082019-06-019202104810.1103/PhysRevX.9.021048High-Resolution Photoemission on Sr_{2}RuO_{4} Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-EnergiesA. TamaiM. ZinglE. RozbickiE. CappelliS. RiccòA. de la TorreS. McKeown WalkerF. Y. BrunoP. D. C. KingW. MeevasanaM. ShiM. RadovićN. C. PlumbA. S. GibbsA. P. MackenzieC. BerthodH. U. R. StrandM. KimA. GeorgesF. BaumbergerWe explore the interplay of electron-electron correlations and spin-orbit coupling in the model Fermi liquid Sr_{2}RuO_{4} 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 β and γ 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 Sr_{2}RuO_{4}.http://doi.org/10.1103/PhysRevX.9.021048 |
| spellingShingle | A. Tamai M. Zingl E. Rozbicki E. Cappelli S. Riccò A. de la Torre S. McKeown Walker F. Y. Bruno P. D. C. King W. Meevasana M. Shi M. Radović N. C. Plumb A. S. Gibbs A. P. Mackenzie C. Berthod H. U. R. Strand M. Kim A. Georges F. Baumberger High-Resolution Photoemission on Sr_{2}RuO_{4} Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies Physical Review X |
| title | High-Resolution Photoemission on Sr_{2}RuO_{4} Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies |
| title_full | High-Resolution Photoemission on Sr_{2}RuO_{4} Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies |
| title_fullStr | High-Resolution Photoemission on Sr_{2}RuO_{4} Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies |
| title_full_unstemmed | High-Resolution Photoemission on Sr_{2}RuO_{4} Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies |
| title_short | High-Resolution Photoemission on Sr_{2}RuO_{4} Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies |
| title_sort | high resolution photoemission on sr 2 ruo 4 reveals correlation enhanced effective spin orbit coupling and dominantly local self energies |
| url | http://doi.org/10.1103/PhysRevX.9.021048 |
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