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Anisotropic and quasipropagating spin excitations in superconducting Ba (Fe0.926 Co0.074)2 As2
Li H.-F.5; Broholm C.4; Vaknin D.5; Fernandes R.M.5; Abernathy D.L.1; Stone M.B.1; Pratt D.K.5; Tian W.5; Qiu Y.3; Ni N.5; Diallo S.O.5; Zarestky J.L.5; Bud'Ko S.L.5; Canfield P.C.5; McQueeney R.J.5
2010-10-12
Source PublicationPhysical Review B - Condensed Matter and Materials Physics
ISSN10980121 1550235X
Volume82Issue:14
AbstractInelastic neutron scattering from superconducting (SC) Ba (Fe Co) As reveals anisotropic and quasi-two-dimensional (2D) magnetic excitations close to Q = (1 2 1 2) - the 2D antiferromagnetic (AFM) wave vector of the parent BaFe As compound. The correlation length anisotropy of these low-energy fluctuations is consistent with spin nematic correlations in the J-J model with J/J ∼1. The spin resonance at ∼8.3 meV in the SC state displays the same anisotropy. The anisotropic fluctuations experimentally evolve into two distinct maxima only along the direction transverse to Q above ∼80 meV indicating unusual quasipropagating excitations. © 2010 The American Physical Society.
DOI10.1103/PhysRevB.82.140503
URLView the original
Language英語
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Cited Times [WOS]:51   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Oak Ridge National Laboratory
2.University of Maryland
3.NIST Center for Neutron Research
4.Johns Hopkins University
5.Iowa State University
Recommended Citation
GB/T 7714
Li H.-F.,Broholm C.,Vaknin D.,et al. Anisotropic and quasipropagating spin excitations in superconducting Ba (Fe0.926 Co0.074)2 As2[J]. Physical Review B - Condensed Matter and Materials Physics,2010,82(14).
APA Li H.-F..,Broholm C..,Vaknin D..,Fernandes R.M..,Abernathy D.L..,...&McQueeney R.J..(2010).Anisotropic and quasipropagating spin excitations in superconducting Ba (Fe0.926 Co0.074)2 As2.Physical Review B - Condensed Matter and Materials Physics,82(14).
MLA Li H.-F.,et al."Anisotropic and quasipropagating spin excitations in superconducting Ba (Fe0.926 Co0.074)2 As2".Physical Review B - Condensed Matter and Materials Physics 82.14(2010).
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