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dc.contributor.authorAase, Niels Henrik
dc.contributor.authorMæland, Kristian
dc.contributor.authorSudbø, Asle
dc.date.accessioned2024-01-26T07:02:28Z
dc.date.available2024-01-26T07:02:28Z
dc.date.created2023-12-06T16:29:06Z
dc.date.issued2023
dc.identifier.issn2469-9950
dc.identifier.urihttps://hdl.handle.net/11250/3113975
dc.description.abstractWe study superconducting three-band systems within strong-coupling Eliashberg theory. In particular, we search for phase-frustrated superconducting systems with spontaneous time-reversal symmetry breaking (TRSB) states. The emergence of TRSB states in multiband systems has so far been studied using microscopic weak-coupling BCS theory or more phenomenological effective field theories such as multicomponent Ginzburg-Landau theories. For systems with three disjoint Fermi surfaces whose electrons experience interactions mediated by phonons, we present a microscopic analysis showing that TRSB states also exist within a strong-coupling microscopic theory. The systems we consider have sizable electron-phonon couplings, putting them into the strong-coupling regime. They are thus a fitting description for strong-coupling materials such as some of the iron pnictides. Moreover, as the TRSB states are challenging to find numerically, we calculate the free energy of multiband systems within strong-coupling theory and make explicit use of it to pin down the TRSB states' elusive nature. Since Eliashberg theory is well incorporated with first-principles calculations, our strong-coupling approach might help facilitate a more efficient search for candidate materials that can exhibit TRSB.en_US
dc.description.abstractMultiband strong-coupling superconductors with spontaneously broken time-reversal symmetryen_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttps://journals.aps.org/prb/pdf/10.1103/PhysRevB.108.214508
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.noo
dc.subjectSuperledningen_US
dc.subjectSuperconductivityen_US
dc.subjectMultibånd superledningen_US
dc.subjectMultiband superconductivityen_US
dc.subjectUkonvensjonell superledningen_US
dc.subjectUnconventional superconductivityen_US
dc.titleMultiband strong-coupling superconductors with spontaneously broken time-reversal symmetryen_US
dc.title.alternativeMultiband strong-coupling superconductors with spontaneously broken time-reversal symmetryen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionacceptedVersion
dc.rights.holder©2024 American Physical Societyen_US
dc.subject.nsiVDP::Kondenserte fasers fysikk: 436en_US
dc.subject.nsiVDP::Condensed matter physics: 436en_US
dc.source.volume108en_US
dc.source.journalPhysical review B (PRB)en_US
dc.identifier.doi10.1103/PhysRevB.108.214508
dc.identifier.cristin2210001
dc.relation.projectNorges forskningsråd: 262633en_US
dc.relation.projectNorges forskningsråd: 323766en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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