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dc.contributor.authorSong, Yu
Van Dyke, John
Lum, I.K.
White, B.D.
Jang, Sooyoung
Yazici, Duygu
Shu, L.
Schneidewind, A.
Čermák, Petr
Qiu, Y.
Maple, M.B.
Morr, Dirk K.
Dai, Pengcheng
dc.date.accessioned 2017-01-09T18:24:39Z
dc.date.available 2017-01-09T18:24:39Z
dc.date.issued 2016
dc.identifier.citation Song, Yu, Van Dyke, John, Lum, I.K., et al.. "Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1−xYbxCoIn5." Nature Communications, 7, (2016) Springer Nature: http://dx.doi.org/10.1038/ncomms12774.
dc.identifier.urihttps://hdl.handle.net/1911/93741
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/
dc.description.abstract The 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.
dc.language.iso eng
dc.publisher Springer Nature
dc.rights This 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. 
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.title Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce1−xYbxCoIn5
dc.type Journal article
dc.citation.journalTitle Nature Communications
dc.citation.volumeNumber 7
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1038/ncomms12774
dc.type.publication publisher version
dc.citation.articleNumber 12774


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This 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. 
Except where otherwise noted, this item's license is described as This 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.