Experimental elucidation of the origin of the ‘double spin resonances’ in Ba(Fe1−xCox)2As2

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dc.citation.articleNumber205149en_US
dc.citation.issueNumber20en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber93en_US
dc.contributor.authorWang, Mengen_US
dc.contributor.authorYi, M.en_US
dc.contributor.authorSun, H. L.en_US
dc.contributor.authorValdivia, P.en_US
dc.contributor.authorKim, M.G.en_US
dc.contributor.authorXu, Z. J.en_US
dc.contributor.authorBerlijn, T.en_US
dc.contributor.authorChristianson, A.D.en_US
dc.contributor.authorChi, Songxueen_US
dc.contributor.authorHashimoto, M.en_US
dc.contributor.authorLu, D.H.en_US
dc.contributor.authorLi, X.D.en_US
dc.contributor.authorBourret-Courchesne, E.en_US
dc.contributor.authorDai, Pengchengen_US
dc.contributor.authorLee, D.H.en_US
dc.contributor.authorMaier, T.A.en_US
dc.contributor.authorBirgeneau, R.J.en_US
dc.date.accessioned2017-02-22T22:34:03Zen_US
dc.date.available2017-02-22T22:34:03Zen_US
dc.date.issued2016en_US
dc.description.abstractWe report a combined study of the spin resonances and superconducting gaps for underdoped (Tc=19 K), optimally doped (Tc=25 K), and overdoped (Tc=19 K) Ba(Fe1−xCox)2As2 single crystals with inelastic neutron scattering and angle resolved photoemission spectroscopy. We find a quasi-two-dimensional spin resonance whose energy scales with the superconducting gap in all three compounds. In addition, anisotropic low energy spin excitation enhancements in the superconducting state have been deduced and characterized for the under and optimally doped compounds. Our data suggest that the quasi-two-dimensional spin resonance is a spin exciton that corresponds to the spin singlet-triplet excitations of the itinerant electrons. However, the intensity enhancements of the anisotropic spin excitations are dominated by the out-of-plane spin excitations of the ordered moments due to the suppression of damping in the superconducting state. Hence we offer an interpretation of the double energy scales differing from previous interpretations based on anisotropic superconducting energy gaps and systematically explain the doping-dependent trend across the phase diagram.en_US
dc.identifier.citationWang, Meng, Yi, M., Sun, H. L., et al.. "Experimental elucidation of the origin of the ‘double spin resonances’ in Ba(Fe1−xCox)2As2." <i>Physical Review B,</i> 93, no. 20 (2016) American Physical Society: http://dx.doi.org/10.1103/PhysRevB.93.205149.en_US
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.93.205149en_US
dc.identifier.urihttps://hdl.handle.net/1911/93965en_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.titleExperimental elucidation of the origin of the ‘double spin resonances’ in Ba(Fe1−xCox)2As2en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
local.sword.agentConverisen_US
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