Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba0.67K0.33(Fe1−xCox)2As2

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dc.citation.articleNumber060502(R)en_US
dc.citation.issueNumber6en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber98en_US
dc.contributor.authorZhang, Ruien_US
dc.contributor.authorWang, Weiyien_US
dc.contributor.authorMaier, Thomas A.en_US
dc.contributor.authorWang, Mengen_US
dc.contributor.authorStone, Matthew B.en_US
dc.contributor.authorChi, Songxueen_US
dc.contributor.authorWinn, Barryen_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2018-11-12T15:39:54Zen_US
dc.date.available2018-11-12T15:39:54Zen_US
dc.date.issued2018en_US
dc.description.abstractWe use inelastic neutron scattering to study the energy and wave-vector dependence of the superconductivity-induced resonance in hole-doped Ba0.67K0.33(Fe1−xCox)2As2 (x=0 and 0.08 with Tc≈37 and 28 K, respectively). In previous work on electron-doped Ba(Fe0.963Ni0.037)2As2 (TN=26K and Tc=17 K), the resonance is found to peak sharply at the antiferromagnetic (AF) ordering wave vector QAF along the longitudinal direction, but disperses upwards away from QAF along the transverse direction [Kim et al., Phys. Rev. Lett. 110, 177002 (2013)]. For hole-doped x=0 and 0.08 without AF order, we find that the resonance displays a ringlike upward dispersion away from QAFalong both the longitudinal and transverse directions. By comparing these results with calculations using the random phase approximation, we conclude that the dispersive resonance is a direct signature of isotropic superconducting gaps arising from nested hole-electron Fermi surfaces.en_US
dc.identifier.citationZhang, Rui, Wang, Weiyi, Maier, Thomas A., et al.. "Neutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba0.67K0.33(Fe1−xCox)2As2." <i>Physical Review B,</i> 98, no. 6 (2018) American Physical Society: https://doi.org/10.1103/PhysRevB.98.060502.en_US
dc.identifier.digitalPhysRevB.98.060502en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.98.060502en_US
dc.identifier.urihttps://hdl.handle.net/1911/103317en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleNeutron spin resonance as a probe of Fermi surface nesting and superconducting gap symmetry in Ba0.67K0.33(Fe1−xCox)2As2en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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