Possible insulator-pseudogap crossover in the attractive Hubbard model on the Lieb lattice

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorHuhtinen, Kukka-Emilia
dc.contributor.authorTörmä, Päivi
dc.contributor.departmentQuantum Dynamics
dc.contributor.departmentDepartment of Applied Physicsen
dc.date.accessioned2021-07-01T13:09:34Z
dc.date.available2021-07-01T13:09:34Z
dc.date.issued2021-06-01
dc.description.abstractWe study the attractive Hubbard model on the Lieb lattice to understand the normal state above the superconducting critical temperature in a flat band system. We use cluster dynamical mean-field theory to compute the two-particle susceptibilities with full quantum fluctuations included in the cluster. At interaction strengths lower than the hopping amplitude, we find that the normal state on the flat band shows insulating behavior stemming from the localization properties of the flat band. A flat-band enhanced pseudogap with a depleted spectral function arises at larger interactions.en
dc.description.versionPeer revieweden
dc.format.extent6
dc.format.mimetypeapplication/pdf
dc.identifier.citationHuhtinen , K-E & Törmä , P 2021 , ' Possible insulator-pseudogap crossover in the attractive Hubbard model on the Lieb lattice ' , Physical Review B , vol. 103 , no. 22 , L220502 . https://doi.org/10.1103/PhysRevB.103.L220502en
dc.identifier.doi10.1103/PhysRevB.103.L220502
dc.identifier.issn2469-9950
dc.identifier.issn2469-9969
dc.identifier.otherPURE UUID: e181164a-d23d-4222-92ec-cdb57fa5577e
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/e181164a-d23d-4222-92ec-cdb57fa5577e
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85107946048&partnerID=8YFLogxK
dc.identifier.otherPURE LINK: https://arxiv.org/abs/2007.05118
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/65156031/PhysRevB.103.L220502.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/108653
dc.identifier.urnURN:NBN:fi:aalto-202107017907
dc.language.isoenen
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseriesVolume 103, issue 22en
dc.rightsopenAccessen
dc.titlePossible insulator-pseudogap crossover in the attractive Hubbard model on the Lieb latticeen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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