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arXiv · 1608.02230

Spin-orbit coupling in Fe-based superconductors

M. M. Korshunov·Yu. N. Togushova·I. Eremin·P. J. Hirschfeld
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Abstract

We study the spin resonance peak in recently discovered iron-based superconductors. The resonance peak observed in inelastic neutron scattering experiments agrees well with predicted results for the extended $s$-wave ($s_\pm$) gap symmetry. Recent neutron scattering measurements show that there is a disparity between longitudinal and transverse components of the dynamical spin susceptibility. Such breaking of the spin-rotational invariance in the spin-liquid phase can occur due to spin-orbit coupling. We study the role of the spin-orbit interaction in the multiorbital model for Fe-pnictides and show how it affects the spin resonance feature.

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M. M. Korshunov, Yu. N. Togushova, I. Eremin, P. J. Hirschfeld. 2016-08-07. Spin-orbit coupling in Fe-based superconductors. https://doi.org/10.1007/s10948-013-2212-6

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