تقرير
High-resolution photoemission on Sr2RuO4 reveals correlation-enhanced effective spin-orbit coupling and dominantly local self-energies
| العنوان: | High-resolution photoemission on Sr2RuO4 reveals correlation-enhanced effective spin-orbit coupling and dominantly local self-energies |
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| المؤلفون: | Tamai, A., Zingl, M., Rozbicki, E., Cappelli, E., Ricco, S., de la Torre, A., Walker, S. McKeown, Bruno, F. Y., King, P. D. C., Meevasana, W., Shi, M., Radovic, M., Plumb, N. C., Gibbs, A. S., Mackenzie, A. P., Berthod, C., Strand, H., Kim, M., Georges, A., Baumberger, F. |
| المصدر: | Phys. Rev. X 9, 021048 (2019) |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science |
| الوصف: | 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 two, due to electronic correlations. The self-energies for the $\beta$ and $\gamma$ 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 non-linear frequency dependence of the self-energies, leading to `kinks' in the quasiparticle dispersion of Sr2RuO4. Comment: PRX accepted |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevX.9.021048 |
| URL الوصول: | http://arxiv.org/abs/1812.06531 |
| رقم الأكسشن: | edsarx.1812.06531 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevX.9.021048 |
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