UNIGE document Scientific Article
previous document  unige:123134  next document
add to browser collection
Title

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

Authors
Zingl, M.
Rozbicki, E.
show hidden authors show all authors [1 - 20]
Published in Physical Review X. 2019, vol. 9, no. 021048, p. 1-18
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 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 Sr2RuO4.
Keywords Condensed matter physicsStrongly correlated materials
Identifiers
Full text
Structures
Projects FNS: 146995
FNS: 165791
Citation
(ISO format)
TAMAI, Anna et al. High-Resolution Photoemission on Sr2RuO4 Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies. In: Physical Review X, 2019, vol. 9, n° 021048, p. 1-18. doi: 10.1103/PhysRevX.9.021048 https://archive-ouverte.unige.ch/unige:123134

123 hits

56 downloads

Update

Deposited on : 2019-09-13

Export document
Format :
Citation style :