Coulomb-enhanced spin-orbit splitting: the missing piece in the Sr2RhO4 puzzle.
The outstanding discrepancy between the measured and calculated (local-density approximation) Fermi surfaces in the well-characterized, paramagnetic Fermi liquid Sr2RhO4 is resolved by including the spin-orbit coupling and Coulomb repulsion. This results in an effective spin-orbit coupling constant enhanced 2.15 times over the bare value. A simple formalism allows discussion of other systems. For Sr2RhO4, the experimental specific-heat and mass enhancements are found to be 2.2.
Liu
Guo-Qiang
GQ
Max-Planck Institut für Festkörperforschung, D-70569 Stuttgart, Germany.
Antonov
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Jepsen
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Andersen
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