% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @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}, }