Coexistence and Competition of the Short-Range Incommensurate Antiferromagnetic Order with the Superconducting State of BaFe2-xNixAs2
Publication: Research - peer-review › Journal article – Annual report year: 2012
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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 language | English |
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| Journal | Physical Review Letters |
| Publication date | 2012 |
| Volume | 108 |
| Journal number | 24 |
| Pages | - |
| ISSN | 0031-9007 |
| DOIs | |
| State | Published |
Bibliographical note
© 2012 American Physical Society
| Citations | Web of Science® Times Cited: 7 |
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