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Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce(1−x)Yb(x)CoIn(5)
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,...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5052703/ https://www.ncbi.nlm.nih.gov/pubmed/27677397 http://dx.doi.org/10.1038/ncomms12774 |
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author | Song, 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 |
author_facet | Song, 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 |
author_sort | Song, Yu |
collection | PubMed |
description | 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 Ce(1−x)Yb(x)CoIn(5) 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 [Image: see text]-wave superconducting gap determined from scanning tunnelling microscopy (STM) for CeCoIn(5), we conclude that the robust upward-dispersing resonance mode in Ce(1−x)Yb(x)CoIn(5) is inconsistent with the downward dispersion predicted within the spin-exciton scenario. |
format | Online Article Text |
id | pubmed-5052703 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-50527032016-10-21 Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce(1−x)Yb(x)CoIn(5) Song, 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 Nat Commun Article 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 Ce(1−x)Yb(x)CoIn(5) 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 [Image: see text]-wave superconducting gap determined from scanning tunnelling microscopy (STM) for CeCoIn(5), we conclude that the robust upward-dispersing resonance mode in Ce(1−x)Yb(x)CoIn(5) is inconsistent with the downward dispersion predicted within the spin-exciton scenario. Nature Publishing Group 2016-09-28 /pmc/articles/PMC5052703/ /pubmed/27677397 http://dx.doi.org/10.1038/ncomms12774 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ 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. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Song, 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 Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce(1−x)Yb(x)CoIn(5) |
title | Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce(1−x)Yb(x)CoIn(5) |
title_full | Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce(1−x)Yb(x)CoIn(5) |
title_fullStr | Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce(1−x)Yb(x)CoIn(5) |
title_full_unstemmed | Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce(1−x)Yb(x)CoIn(5) |
title_short | Robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor Ce(1−x)Yb(x)CoIn(5) |
title_sort | robust upward dispersion of the neutron spin resonance in the heavy fermion superconductor ce(1−x)yb(x)coin(5) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5052703/ https://www.ncbi.nlm.nih.gov/pubmed/27677397 http://dx.doi.org/10.1038/ncomms12774 |
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