Fully gapped d-wave superconductivity in CeCu2Si2

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dc.citation.firstpage5343en_US
dc.citation.issueNumber21en_US
dc.citation.journalTitleProceedings of the National Academy of Sciencesen_US
dc.citation.lastpage5347en_US
dc.citation.volumeNumber115en_US
dc.contributor.authorPang, Guimingen_US
dc.contributor.authorSmidman, Michaelen_US
dc.contributor.authorZhang, Jingleien_US
dc.contributor.authorJiao, Linen_US
dc.contributor.authorWeng, Zongfaen_US
dc.contributor.authorNica, Emilian M.en_US
dc.contributor.authorChen, Yeen_US
dc.contributor.authorJiang, Wenbingen_US
dc.contributor.authorZhang, Yongjunen_US
dc.contributor.authorXie, Wuen_US
dc.contributor.authorJeevan, Hirale S.en_US
dc.contributor.authorLee, Hanohen_US
dc.contributor.authorGegenwart, Philippen_US
dc.contributor.authorSteglich, Franken_US
dc.contributor.authorSi, Qimiaoen_US
dc.contributor.authorYuan, Huiqiuen_US
dc.date.accessioned2019-11-22T16:20:00Zen_US
dc.date.available2019-11-22T16:20:00Zen_US
dc.date.issued2018en_US
dc.description.abstractThe nature of the pairing symmetry of the first heavy fermion superconductor CeCu2Si2 has recently become the subject of controversy. While CeCu2Si2 was generally believed to be a d-wave superconductor, recent low-temperature specific heat measurements showed evidence for fully gapped superconductivity, contrary to the nodal behavior inferred from earlier results. Here, we report London penetration depth measurements, which also reveal fully gapped behavior at very low temperatures. To explain these seemingly conflicting results, we propose a fully gapped d+d band-mixing pairing state for CeCu2Si2, which yields very good fits to both the superfluid density and specific heat, as well as accounting for a sign change of the superconducting order parameter, as previously concluded from inelastic neutron scattering results.en_US
dc.identifier.citationPang, Guiming, Smidman, Michael, Zhang, Jinglei, et al.. "Fully gapped d-wave superconductivity in CeCu2Si2." <i>Proceedings of the National Academy of Sciences,</i> 115, no. 21 (2018) National Academy of Sciences: 5343-5347. https://doi.org/10.1073/pnas.1720291115.en_US
dc.identifier.digitalpnas.201720291en_US
dc.identifier.doihttps://doi.org/10.1073/pnas.1720291115en_US
dc.identifier.urihttps://hdl.handle.net/1911/107729en_US
dc.language.isoengen_US
dc.publisherNational Academy of Sciencesen_US
dc.rightsThis open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).en_US
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.titleFully gapped d-wave superconductivity in CeCu2Si2en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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