The Fermi surface of Sr2RuO4: spin-orbit and anisotropic Coulomb interaction effects

Abstract

The topology of the Fermi surface of Sr2RuO4 is well described by local-density approximation calculations with spin-orbit interaction, but the relative size of its different sheets is not. By accounting for many-body effects via dynamical mean-field theory, we show that the standard isotropic Coulomb interaction alone worsens or does not correct this discrepancy. In order to reproduce experiments, it is essential to account for the Coulomb anisotropy. The latter is small but has strong effects; it competes with the Coulomb-enhanced spin-orbit coupling and the isotropic Coulomb term in determining the Fermi surface shape. Its effects are likely sizable in other correlated multi-orbital systems. In addition, we find that the low-energy self-energy matrix -- responsible for the reshaping of the Fermi surface -- sizably differ from the static Hartree-Fock limit. Finally, we find a strong spin-orbital {entanglement}; this supports the view that the conventional description of Cooper pairs via factorized spin and orbital part might not apply to Sr2RuO4.

5 pages, 4 figures

References in corpus (7)

• Continuous-time Monte Carlo methods for quantum impurity models
• The coherence-incoherence crossover and the mass-renormalization puzzles in Sr2RuO4
• Strong spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4
• Subband filling and Mott transition in Ca_{2-x}Sr_xRuO_4
• Evidence for strong electronic correlations in the spectra of Sr${}_2$RuO${}_4$
• Importance of exchange-anisotropy and superexchange for the spin-state transitions in LnCoO3 (Ln=La,Y,RE) cobaltates
• Multi-orbital physics in Fermi liquids prone to magnetic order

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• Anisotropy and multiband superconductivity in Sr2RuO4
• Higher angular momentum pairing states in Sr${}_2$RuO${}_4$ in the presence of longer-range interactions
• Inter-orbital p- and d-wave pairings between $d_{xz/yz}$ and $d_{xy}$ orbitals in Sr${}_2$RuO${}_4$
• First-Principles Correlated Approach to the Normal State of Strontium Ruthenate
• Coulomb matrix elements in multi-orbital Hubbard models
• Theoretical studies for identifying horizontal line nodes via angle-resolved density of states measurements ---Application to Sr${}_2$RuO${}_4$---
• Tunable electronic and magnetic phases in layered ruthenates: SrRuO3-SrTiO3 heterostructure upon strain
• Enhanced Spin-Orbit Coupling in a Correlated Metal
• Evolution of Spin-Orbital Entanglement with Increasing Ising Spin-Orbit Coupling
• Anomalous Fermi pockets on Hund's metal surface of Sr2RuO4 induced by the correlation-enhanced spin-orbit coupling
• Comparing the effective enhancement of local and non-local spin-orbit couplings on honeycomb lattices due to strong electronic correlations