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@ARTICLE{Song:877404,
author = {Song, Yu and Wang, Weiyi and S. Van Dyke, John and Pouse,
Naveen and Ran, Sheng and Yazici, Duygu and Schneidewind, A.
and Cermak, Petr and Qiu, Y. and Maple, M. B. and Morr, Dirk
K. and Dai, Pengcheng},
title = {{N}ature of the spin resonance mode in {C}e{C}o{I}n5},
journal = {Communications Physics},
volume = {3},
number = {1},
issn = {2399-3650},
address = {London},
publisher = {Springer Nature},
reportid = {FZJ-2020-02173},
pages = {98},
year = {2020},
abstract = {Spin-fluctuation-mediated unconventional superconductivity
can emerge at the border of magnetism, featuring a
superconducting order parameter that changes sign in
momentum space. Detection of such a sign-change is
experimentally challenging, since most probes are not
phase-sensitive. The observation of a spin resonance mode
(SRM) from inelastic neutron scattering is often seen as
strong phase-sensitive evidence for a sign-changing
superconducting order parameter, by assuming the SRM is a
spin-excitonic bound state. Here we show that for the heavy
fermion superconductor CeCoIn5, its SRM defies expectations
for a spin-excitonic bound state, and is not a manifestation
of sign-changing superconductivity. Instead, the SRM in
CeCoIn5 likely arises from a reduction of damping to a
magnon-like mode in the superconducting state, due to its
proximity to magnetic quantum criticality. Our findings
emphasize the need for more stringent tests of whether SRMs
are spin-excitonic, when using their presence to evidence
sign-changing superconductivity.},
cin = {JCNS-FRM-II / JCNS-2 / MLZ},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106 / I:(DE-588b)4597118-3},
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:000553489000002},
doi = {10.1038/s42005-020-0365-8},
url = {https://juser.fz-juelich.de/record/877404},
}