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Spin-Orbit Coupling in Fe-Based Superconductors

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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 ±) gap symmetry. Recent neutron scattering measurements show that there is a disparity between transverse and longitudinal 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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Acknowledgements

Partial support was provided by DOE DE-FG02-05ER46236 (P.J.H. and M.M.K.) and NSF-DMR-1005625 (P.J.H.). M.M.K. acknowledges support from RFBR (Grants 09-02-00127, 12-02-31534 and 13-02-01395), Presidium of RAS program “Quantum mesoscopical and disordered structures” N20.7, FCP Scientific and Research-and-Educational Personnel of Innovative Russia for 2009–2013 (GK 16.740.12.0731 and GK P891), and Siberian Federal University (Theme N F-11), Program of SB RAS #44, and The Dynasty Foundation and ICFPM. I.E. acknowledges support of the SFB Transregio 12, Merkur Foundation, and German Academic Exchange Service (DAAD PPP USA No. 50750339).

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Authors and Affiliations

  1. L.V. Kirensky Institute of Physics, Krasnoyarsk, 660036, Russia

    M. M. Korshunov

  2. Siberian Federal University, Svobodny Prospect 79, Krasnoyarsk, 660041, Russia

    M. M. Korshunov & Y. N. Togushova

  3. Institut für Theoretische Physik III, Ruhr-Universität Bochum, 44801, Bochum, Germany

    I. Eremin

  4. Kazan Federal University, Kazan, 420008, Russia

    I. Eremin

  5. Department of Physics, University of Florida, Gainesville, FL, 32611, USA

    P. J. Hirschfeld

Authors
  1. M. M. Korshunov
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  2. Y. N. Togushova
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  3. I. Eremin
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  4. P. J. Hirschfeld
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Correspondence to M. M. Korshunov.

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Korshunov, M.M., Togushova, Y.N., Eremin, I. et al. Spin-Orbit Coupling in Fe-Based Superconductors. J Supercond Nov Magn 26, 2873–2874 (2013). https://doi.org/10.1007/s10948-013-2212-6

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  • DOI: https://doi.org/10.1007/s10948-013-2212-6

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