Edwards-Anderson parameter and local Ising nematicity in FeSe revealed via NMR spectral broadening

Paul Wiecki, Rui Zhou, Marc-Henri Julien, Anna E. Böhmer, and Jörg Schmalian
Phys. Rev. B 104, 125134 – Published 22 September 2021

Abstract

The NMR spectrum of FeSe shows a dramatic broadening on cooling towards the bulk nematic phase at Ts=90 K, due to the formation of a quasistatic, short-range-ordered nematic domain structure. However, a quantitative understanding of the NMR broadening and its relationship to the nematic susceptibility is still lacking. Here, we show that the temperature and pressure dependence of the broadening is in quantitative agreement with the mean-field Edwards-Anderson parameter of an Ising-nematic model in the presence of random-field disorder introduced by nonmagnetic impurities. Furthermore, these results reconcile the interpretation of NMR and Raman spectroscopy data in FeSe under pressure.

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  • Received 21 July 2021
  • Revised 6 September 2021
  • Accepted 8 September 2021

DOI:https://doi.org/10.1103/PhysRevB.104.125134

©2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Paul Wiecki1, Rui Zhou2, Marc-Henri Julien2, Anna E. Böhmer1,3, and Jörg Schmalian1,4

  • 1Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany
  • 2Laboratoire National des Champs Magnétiques Intenses–European Magnetic Field Laboratory, UPR3228 Centre National de la Recherche Scientifique, Université Grenoble Alpes, Institut National des Sciences Appliquées de Toulouse, Université Paul Sabatier, Grenoble, France
  • 3Institut für Experimentalphysik IV, Ruhr-Universität Bochum, 44801 Bochum, Germany
  • 4Institute for Theory of Condensed Matter, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany

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Vol. 104, Iss. 12 — 15 September 2021

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