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  • Author: Luo, Huiqian, China

    Institute of Physics, Chinese Academy of Sciences, China

  • Author: Zhang, Rui, China

    Institute of Physics, Chinese Academy of Sciences, China

  • Author: Laver, Mark

    Unknown

  • Author: Yamani, Zahra, Canada

    National Research Council, Chalk River Laboratories, Canada

  • Author: Wang, Meng, China

    Institute of Physics, Chinese Academy of Sciences, China

  • Author: Lu, Xingye, China

    Institute of Physics, Chinese Academy of Sciences, China

  • Author: Wang, Miaoyin, United States

    Department of Physics and Astronomy, The University of Tennessee, United States

  • Author: Chen, Yanchao, China

    Institute of Physics, Chinese Academy of Sciences, China

  • Author: Li, Shiliang, China

    Institute of Physics, Chinese Academy of Sciences, China

  • Author: Chang, Sung, United States

    NIST Center for Neutron Research, National Institute of Standards and Technology, United States

  • Author: Lynn, Jeffrey W., United States

    NIST Center for Neutron Research, National Institute of Standards and Technology, United States

  • Author: Dai, Pengcheng, United States

    Department of Physics and Astronomy, The University of Tennessee, United States

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Superconductivity in the iron pnictides develops near antiferromagnetism, and the antiferromagnetic (AF) phase appears to overlap with the superconducting phase in some materials such as BaFe2-xTxAs2 (where T = Co or Ni). Here we use neutron scattering to demonstrate that genuine long-range AF order and superconductivity do not coexist in BaFe2-xNixAs2 near optimal superconductivity. In addition, we find a first-order-like AF-to-superconductivity phase transition with no evidence for a magnetic quantum critical point. Instead, the data reveal that incommensurate short-range AF order coexists and competes with superconductivity, where the AF spin correlation length is comparable to the superconducting coherence length.
Original languageEnglish
JournalPhysical Review Letters
Publication date2012
Volume108
Journal number24
Pages-
ISSN0031-9007
DOIs
StatePublished

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© 2012 American Physical Society

CitationsWeb of Science® Times Cited: 15
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