dc.contributor.author | Aase, Niels Henrik | |
dc.contributor.author | Mæland, Kristian | |
dc.contributor.author | Sudbø, Asle | |
dc.date.accessioned | 2024-01-26T07:02:28Z | |
dc.date.available | 2024-01-26T07:02:28Z | |
dc.date.created | 2023-12-06T16:29:06Z | |
dc.date.issued | 2023 | |
dc.identifier.issn | 2469-9950 | |
dc.identifier.uri | https://hdl.handle.net/11250/3113975 | |
dc.description.abstract | We 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.abstract | Multiband strong-coupling superconductors with spontaneously broken time-reversal symmetry | en_US |
dc.language.iso | eng | en_US |
dc.publisher | American Physical Society | en_US |
dc.relation.uri | https://journals.aps.org/prb/pdf/10.1103/PhysRevB.108.214508 | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.noo | |
dc.subject | Superledning | en_US |
dc.subject | Superconductivity | en_US |
dc.subject | Multibånd superledning | en_US |
dc.subject | Multiband superconductivity | en_US |
dc.subject | Ukonvensjonell superledning | en_US |
dc.subject | Unconventional superconductivity | en_US |
dc.title | Multiband strong-coupling superconductors with spontaneously broken time-reversal symmetry | en_US |
dc.title.alternative | Multiband strong-coupling superconductors with spontaneously broken time-reversal symmetry | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | acceptedVersion | |
dc.rights.holder | ©2024 American Physical Society | en_US |
dc.subject.nsi | VDP::Kondenserte fasers fysikk: 436 | en_US |
dc.subject.nsi | VDP::Condensed matter physics: 436 | en_US |
dc.source.volume | 108 | en_US |
dc.source.journal | Physical review B (PRB) | en_US |
dc.identifier.doi | 10.1103/PhysRevB.108.214508 | |
dc.identifier.cristin | 2210001 | |
dc.relation.project | Norges forskningsråd: 262633 | en_US |
dc.relation.project | Norges forskningsråd: 323766 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |