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dc.contributor.authorErlandsen, Eirik
dc.contributor.authorBrataas, Arne
dc.contributor.authorSudbø, Asle
dc.date.accessioned2020-03-09T14:12:10Z
dc.date.available2020-03-09T14:12:10Z
dc.date.created2020-03-05T07:38:05Z
dc.date.issued2020
dc.identifier.citationPhysical review B (PRB). 2020, 101 .nb_NO
dc.identifier.issn2469-9950
dc.identifier.urihttp://hdl.handle.net/11250/2646071
dc.description.abstractWe study superconductivity on the surface of a topological insulator, mediated by magnetic fluctuations in an adjacent ferromagnetic or antiferromagnetic insulator. Superconductivity can arise from effective interactions between helical fermions induced by interfacial fermion-magnon interactions. For both ferromagnetic and antiferromagnetic insulators, these fermion-fermion interactions have the correct structure to facilitate pairing between particles located on the same side of the Fermi surface, also known as Amperean pairing. In antiferromagnets, the strength of the induced interactions can be enhanced by coupling the topological insulator asymmetrically to the two sublattices of the antiferromagnet. This effect is further amplified by nextnearest- neighbor frustration in the antiferromagnetic insulator. The enhancement makes the induced interactions significantly stronger in the antiferromagnetic case compared to the ferromagnetic case. These results indicate that an uncompensated antiferromagnetic interface might be a better candidate than a ferromagnetic interface for proximity-induced magnon-mediated superconductivity on the surface of a topological insulator.nb_NO
dc.language.isoengnb_NO
dc.publisherAmerican Physical Societynb_NO
dc.relation.urihttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.101.094503
dc.subjectSqueezed magnonsnb_NO
dc.subjectUkonvensjonell superledningnb_NO
dc.subjectUnconventional superconductivitynb_NO
dc.subjectTopologiske isolatorernb_NO
dc.subjectToplogical insulatorsnb_NO
dc.titleMagnon-mediated superconductivity on the surface of a topological insulatornb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.subject.nsiVDP::Kondenserte fasers fysikk: 436nb_NO
dc.subject.nsiVDP::Condensed matter physics: 436nb_NO
dc.source.pagenumber11nb_NO
dc.source.volume101nb_NO
dc.source.journalPhysical review B (PRB)nb_NO
dc.identifier.doi10.1103/PhysRevB.101.094503
dc.identifier.cristin1799714
dc.relation.projectNorges forskningsråd: 250985nb_NO
dc.relation.projectNorges forskningsråd: 262633nb_NO
dc.description.localcode© American Physical Society 2020. This is the authors accepted and refereed manuscript to the article.nb_NO
cristin.unitcode194,66,20,0
cristin.unitnameInstitutt for fysikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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