Coexistence and competition of the short-range incommensurate antiferromagnetic order with superconducting state of BaFe2-xNixAs2

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.108.247002
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TypeArticle
Journal titlePhysical Review Letters
Volume108
Issue24
Pages247002-1247002-5
AbstractSuperconductivity 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.
Publication date
LanguageEnglish
AffiliationNRC Canadian Neutron Beam Centre; National Research Council Canada
Peer reviewedYes
NPARC number20140145
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Record identifier56aa113d-1450-4a7f-91fd-3206659449b7
Record created2012-06-14
Record modified2016-05-09
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