Coexistence and Competition of the Short-Range Incommensurate Antiferromagnetic Order with the Superconducting State of BaFe2-xNixAs2

Huiqian Luo, Rui Zhang, Mark Laver, Zahra Yamani, Meng Wang, Xingye Lu, Miaoyin Wang, Yanchao Chen, Shiliang Li, Sung Chang, Jeffrey W. Lynn, Pengcheng Dai

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Abstract

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
Volume108
Issue number24
Pages (from-to)-
ISSN0031-9007
DOIs
Publication statusPublished - 2012
Externally publishedYes

Bibliographical note

© 2012 American Physical Society

Cite this

Luo, H., Zhang, R., Laver, M., Yamani, Z., Wang, M., Lu, X., Wang, M., Chen, Y., Li, S., Chang, S., Lynn, J. W., & Dai, P. (2012). Coexistence and Competition of the Short-Range Incommensurate Antiferromagnetic Order with the Superconducting State of BaFe2-xNixAs2. Physical Review Letters, 108(24), -. https://doi.org/10.1103/PhysRevLett.108.247002