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  • Author: Luo, Huiqian

    Chinese Academy of Sciences, China

  • Author: Zhang, Rui

    Chinese Academy of Sciences, China

  • Author: Laver, Mark

    Unknown

  • Author: Yamani, Zahra

    National Research Council, Chalk River Laboratories, Canada

  • Author: Wang, Meng

    Chinese Academy of Sciences, China

  • Author: Lu, Xingye

    Chinese Academy of Sciences, China

  • Author: Wang, Miaoyin

    University of Tennessee, United States

  • Author: Chen, Yanchao

    Chinese Academy of Sciences, China

  • Author: Li, Shiliang

    Chinese Academy of Sciences, China

  • Author: Chang, Sung

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

  • Author: Lynn, Jeffrey W.

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

  • Author: Dai, Pengcheng

    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
Issue24
Pages-
ISSN0031-9007
DOIs
StatePublished

Bibliographical note

© 2012 American Physical Society

CitationsWeb of Science® Times Cited: 19
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