This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevLett.116.106402 in citations.
Please use the identifier: http://hdl.handle.net/2128/13172 in citations.
Fermi Surface of Sr$_{2}$RuO$_{4}$: Spin-Orbit and Anisotropic Coulomb Interaction Effects
Fermi Surface of Sr$_{2}$RuO$_{4}$: Spin-Orbit and Anisotropic Coulomb Interaction Effects
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 Coulo...
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Personal Name(s): | Zhang, G. |
---|---|
Gorelov, E. / Sarvestani, E. / Pavarini, Eva (Corresponding author) | |
Contributing Institute: |
JARA - HPC; JARA-HPC Theoretische Nanoelektronik; IAS-3 |
Published in: | Physical review letters, 116 (2016) S. 106402 |
Imprint: |
College Park, Md.
APS
2016
|
DOI: |
10.1103/PhysRevLett.116.106402 |
PubMed ID: |
27015496 |
Document Type: |
Journal Article |
Research Program: |
Multiplet effects in strongly correlated materials Multiplet effects in strongly correlated materials Order-disorder transitions in strongly correlated systems Controlling Collective States |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/13172 in citations.
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 multiorbital systems. In addition, we find that the low-energy self-energy matrix—responsible for the reshaping of the Fermi surface—sizably differs 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. |