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Magnetic ground state of FeSe

Author

Listed:
  • Qisi Wang

    (Fudan University)

  • Yao Shen

    (Fudan University)

  • Bingying Pan

    (Fudan University)

  • Xiaowen Zhang

    (Fudan University)

  • K. Ikeuchi

    (Research Center for Neutron Science and Technology, Comprehensive Research Organization for Science and Society)

  • K. Iida

    (Research Center for Neutron Science and Technology, Comprehensive Research Organization for Science and Society)

  • A. D. Christianson

    (Oak Ridge National Laboratory
    University of Tennessee)

  • H. C. Walker

    (ISIS Facility, Rutherford Appleton Laboratory, STFC, Chilton)

  • D. T. Adroja

    (ISIS Facility, Rutherford Appleton Laboratory, STFC, Chilton)

  • M. Abdel-Hafiez

    (Center for High Pressure Science and Technology Advanced Research
    Faculty of Science, Fayoum University)

  • Xiaojia Chen

    (Center for High Pressure Science and Technology Advanced Research)

  • D. A. Chareev

    (Institute of Experimental Mineralogy, Russian Academy of Sciences
    Institute of Physics and Technology, Ural Federal University)

  • A. N. Vasiliev

    (Institute of Physics and Technology, Ural Federal University
    M.V. Lomonosov Moscow State University
    National University of Science and Technology ‘MISiS’)

  • Jun Zhao

    (Fudan University
    Collaborative Innovation Center of Advanced Microstructures)

Abstract

Elucidating the nature of the magnetism of a high-temperature superconductor is crucial for establishing its pairing mechanism. The parent compounds of the cuprate and iron-pnictide superconductors exhibit Néel and stripe magnetic order, respectively. However, FeSe, the structurally simplest iron-based superconductor, shows nematic order (Ts=90 K), but not magnetic order in the parent phase, and its magnetic ground state is intensely debated. Here we report inelastic neutron-scattering experiments that reveal both stripe and Néel spin fluctuations over a wide energy range at 110 K. On entering the nematic phase, a substantial amount of spectral weight is transferred from the Néel to the stripe spin fluctuations. Moreover, the total fluctuating magnetic moment of FeSe is ∼60% larger than that in the iron pnictide BaFe2As2. Our results suggest that FeSe is a novel S=1 nematic quantum-disordered paramagnet interpolating between the Néel and stripe magnetic instabilities.

Suggested Citation

  • Qisi Wang & Yao Shen & Bingying Pan & Xiaowen Zhang & K. Ikeuchi & K. Iida & A. D. Christianson & H. C. Walker & D. T. Adroja & M. Abdel-Hafiez & Xiaojia Chen & D. A. Chareev & A. N. Vasiliev & Jun Zh, 2016. "Magnetic ground state of FeSe," Nature Communications, Nature, vol. 7(1), pages 1-7, November.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12182
    DOI: 10.1038/ncomms12182
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    Cited by:

    1. M. Čulo & S. Licciardello & K. Ishida & K. Mukasa & J. Ayres & J. Buhot & Y.-T. Hsu & S. Imajo & M. W. Qiu & M. Saito & Y. Uezono & T. Otsuka & T. Watanabe & K. Kindo & T. Shibauchi & S. Kasahara & Y., 2023. "Expanded quantum vortex liquid regimes in the electron nematic superconductors FeSe1−xSx and FeSe1−xTex," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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