Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1−xYbxCoIn5

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dc.citation.articleNumber12774
dc.citation.journalTitleNature Communicationsen_US
dc.citation.volumeNumber7en_US
dc.contributor.authorSong, Yuen_US
dc.contributor.authorVan Dyke, Johnen_US
dc.contributor.authorLum, I.K.en_US
dc.contributor.authorWhite, B.D.en_US
dc.contributor.authorJang, Sooyoungen_US
dc.contributor.authorYazici, Duyguen_US
dc.contributor.authorShu, L.en_US
dc.contributor.authorSchneidewind, A.en_US
dc.contributor.authorČermák, Petren_US
dc.contributor.authorQiu, Y.en_US
dc.contributor.authorMaple, M.B.en_US
dc.contributor.authorMorr, Dirk K.en_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2017-01-09T18:24:39Z
dc.date.available2017-01-09T18:24:39Z
dc.date.issued2016en_US
dc.descriptionNEWS COVERAGE: A news release based on this journal publication is available online: http://news.rice.edu/2016/09/29/physicists-probe-magnetic-fluctuations-in-heavy-fermion/en_US
dc.description.abstractThe neutron spin resonance is a collective magnetic excitation that appears in the unconventional copper oxide, iron pnictide and heavy fermion superconductors. Although the resonance is commonly associated with a spin-exciton due to the d(s±)-wave symmetry of the superconducting order parameter, it has also been proposed to be a magnon-like excitation appearing in the superconducting state. Here we use inelastic neutron scattering to demonstrate that the resonance in the heavy fermion superconductor Ce1−xYbxCoIn5 with x=0, 0.05 and 0.3 has a ring-like upward dispersion that is robust against Yb-doping. By comparing our experimental data with a random phase approximation calculation using the electronic structure and the momentum dependence of the -wave superconducting gap determined from scanning tunnelling microscopy (STM) for CeCoIn5, we conclude that the robust upward-dispersing resonance mode in Ce1−xYbxCoIn5 is inconsistent with the downward dispersion predicted within the spin-exciton scenario.en_US
dc.identifier.citationSong, Yu, Van Dyke, John, Lum, I.K., et al.. "Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1−xYbxCoIn5." <i>Nature Communications,</i> 7, (2016) Springer Nature: http://dx.doi.org/10.1038/ncomms12774.
dc.identifier.doihttp://dx.doi.org/10.1038/ncomms12774en_US
dc.identifier.urihttps://hdl.handle.net/1911/93741
dc.language.isoengen_US
dc.publisherSpringer Nature
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleRobust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1−xYbxCoIn5en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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