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Journal Article

Strong Spin-Orbit Coupling Effects on the Fermi Surface of Sr2RuO4 and Sr2RhO4

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Haverkort, M. W., Elfimov, I. S., Tjeng, L. H., Sawatzky, G. A., & Damascelli, A. (2008). Strong Spin-Orbit Coupling Effects on the Fermi Surface of Sr2RuO4 and Sr2RhO4. Physical Review Letters, 101(2): 026406, pp. 1-4. doi:10.1103/PhysRevLett.101.026406.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-0F89-D
We present a first-principles study of spin-orbit coupling effects on the Fermi surface of Sr(2)RuO(4) and Sr(2)RhO(4). For nearly degenerate bands, spin-orbit coupling leads to a dramatic change of the Fermi surface with respect to nonrelativistic calculations; as evidenced by the comparison with experiments on Sr(2)RhO(4), it cannot be disregarded. For Sr(2)RuO(4), the Fermi surface modifications are more subtle but equally dramatic in the detail: Spin-orbit coupling induces a strong momentum dependence, normal to the RuO(2) planes, for both orbital and spin character of the low-energy electronic states. These findings have profound implications for the understanding of unconventional superconductivity in Sr(2)RuO(4).