Strong spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4

Details Strong spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4 Strong spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4

2008-03-03

arxiv.org/abs/0803.0352v1

Phys. Rev. Lett. 101, 026406 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

A high-resolution version can be found at http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/SO_Sr2RuO4.pdf

Scientific paper

10.1103/PhysRevLett.101.026406

We present a first-principle study of spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4. For nearly degenerate bands, spin-orbit coupling leads to a dramatic change of the Fermi surface with respect to non-relativistic calculations; as evidenced by the comparison with experiments on Sr2RhO4, it cannot be disregarded. For Sr2RuO4, the Fermi surface modifications are more subtle but equally dramatic in the detail: spin-orbit coupling induces a strong momentum dependence, normal to the RuO2 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 Sr2RuO4.

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