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Anomalous Upper Critical Field in CeCoIn_5/YbCoIn_5 Superlattices with a Rashba-type Heavy Fermion Interface

hal.structure.identifierDepartment of Physics [Kyoto]
hal.structure.identifierCavendish Laboratory
dc.contributor.authorGOH, S. K.
hal.structure.identifierDepartment of Physics [Kyoto]
dc.contributor.authorMIZUKAMI, Y.
hal.structure.identifierDepartment of Physics [Kyoto]
dc.contributor.authorSHISHIDO, H.
hal.structure.identifierDepartment of Physics [Kyoto]
dc.contributor.authorWATANABE, D.
hal.structure.identifierDepartment of Physics [Kyoto]
dc.contributor.authorYASUMOTO, S.
hal.structure.identifierDepartment of Physics [Kyoto]
dc.contributor.authorSHIMOZAWA, M.
hal.structure.identifierDepartment of Physics [Kyoto]
dc.contributor.authorYAMASHITA, Minoru
hal.structure.identifierResearch Center for Low Temperature and Materials Sciences
dc.contributor.authorTERASHIMA, T.
hal.structure.identifierDepartment of Physics [Niigata]
dc.contributor.authorYANASE, Y.
hal.structure.identifierDepartment of Physics [Kyoto]
dc.contributor.authorSHIBAUCHI, T.
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorBUZDIN, Alexandre I.
hal.structure.identifierDepartment of Physics [Kyoto]
dc.contributor.authorMATSUDA, Y.
dc.date.created2012-07-20
dc.date.issued2012
dc.identifier.issn0031-9007
dc.description.abstractEnWe report a highly unusual angular variation of the upper critical field (H_c2) in epitaxial superlattices CeCoIn_5(n)/YbCoIn_5(5), formed by alternating layers of n and a 5 unit-cell thick heavy-fermion superconductor CeCoIn_5 with a strong Pauli effect and normal metal YbCoIn_5, respectively. For the n=3 superlattice, H_{c2}(\theta) changes smoothly as a function of the field angle \theta. However, close to the superconducting transition temperature, H_{c2}(\theta) exhibits a cusp near the parallel field (\theta=0 deg). This cusp behavior disappears for n=4 and 5 superlattices. This sudden disappearance suggests the relative dominance of the orbital depairing effect in the n=3 superlattice, which may be due to the suppression of the Pauli effect in a system with local inversion symmetry breaking. Taking into account the temperature dependence of H_{c2}(\theta) as well, our results suggest that some exotic superconducting states, including a helical superconducting state, might be realized at high magnetic fields.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.subject.enMixed states - critical fields and surface sheaths
dc.subject.enMolecular - atomic - ion and chemical beam epitaxy
dc.title.enAnomalous Upper Critical Field in CeCoIn_5/YbCoIn_5 Superlattices with a Rashba-type Heavy Fermion Interface
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevLett.109.157006
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Supraconductivité [cond-mat.supr-con]
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
dc.identifier.arxiv1207.4889
bordeaux.journalPhysical Review Letters
bordeaux.page157006
bordeaux.volume109
bordeaux.issue15
bordeaux.peerReviewedoui
hal.identifierhal-00757385
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00757385v1
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