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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