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@ARTICLE{Song:819535,
author = {Song, Yu and Van Dyke, John and Lum, I. K. and White, B. D.
and Jang, Sooyoung and Yazici, Duygu and Shu, L. and
Schneidewind, Astrid and Čermák, Petr and Qiu, Y. and
Maple, M. B. and Morr, Dirk K. and Dai, Pengcheng},
title = {{R}obust upward dispersion of the neutron spin resonance in
the heavy fermion superconductor {C}e1−x{Y}bx{C}o{I}n5},
journal = {Nature Communications},
volume = {7},
issn = {2041-1723},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2016-05178},
pages = {12774 -},
year = {2016},
abstract = {The neutron spin resonance is a collective magnetic
excitation that appears in theunconventional copper oxide,
iron pnictide and heavy fermion superconductors. Althoughthe
resonance is commonly associated with a spin-exciton due to
the d(s±)-wave symmetryof the superconducting order
parameter, it has also been proposed to be amagnon-like
excitation appearing in the superconducting state. Here we
use inelastic neutronscattering to demonstrate that the
resonance in the heavy fermion superconductorCe1-xYbxCoIn5
with x=0, 0.05 and 0.3 has a ring-like upward dispersion
that is robustagainst Yb-doping. By comparing our
experimental data with a random phase
approximationcalculation using the electronic structure and
the momentum dependence of the d(x2 -y2)-wavesuperconducting
gap determined from scanning tunnelling microscopy (STM) for
CeCoIn5,we conclude that the robust upward-dispersing
resonance mode in Ce1-xYbxCoIn5 isinconsistent with the
downward dispersion predicted within the spin-exciton
scenario.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / JCNS-2},
ddc = {500},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)PANDA-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000385256500004},
pubmed = {pmid:27677397},
doi = {10.1038/ncomms12774},
url = {https://juser.fz-juelich.de/record/819535},
}