Model of Electronic Structure and Superconductivity in Orbitally Ordered FeSe

Shantanu Mukherjee, A. Kreisel, P. J. Hirschfeld, and Brian M. Andersen
Phys. Rev. Lett. 115, 026402 – Published 8 July 2015
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Abstract

We provide a band structure with low-energy properties consistent with recent photoemission and quantum oscillation measurements on FeSe, assuming mean-field-like site- and/or bond-centered ferro-orbital ordering at the structural transition. We show how the resulting model provides a consistent explanation of the temperature dependence of the measured Knight shift and the spin-relaxation rate. Furthermore, the superconducting gap structure obtained from spin-fluctuation theory exhibits nodes on the electron pockets, consistent with the V-shaped density of states obtained by tunneling spectroscopy on this material, and the temperature dependence of the London penetration depth.

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  • Received 11 February 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.026402

© 2015 American Physical Society

Authors & Affiliations

Shantanu Mukherjee1, A. Kreisel1, P. J. Hirschfeld2, and Brian M. Andersen1

  • 1Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
  • 2Department of Physics, University of Florida, Gainesville, Florida 32611, USA

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Vol. 115, Iss. 2 — 10 July 2015

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