Correlation induced magnetic topological phases in the mixed-valence compound SmB6

dc.bibliographicCitation.articleNumberL042028
dc.bibliographicCitation.firstPageL042028
dc.bibliographicCitation.issue4
dc.bibliographicCitation.journalTitlePhysical Review Researcheng
dc.bibliographicCitation.volume5
dc.contributor.authorLiu, Huimei
dc.contributor.authorHirschmann, Moritz M.
dc.contributor.authorSawatzky, George A.
dc.contributor.authorKhaliullin, Giniyat
dc.contributor.authorSchnyder, Andreas P.
dc.date.accessioned2024-05-10T05:38:26Z
dc.date.available2024-05-10T05:38:26Z
dc.date.issued2023
dc.description.abstractSmB6 is a mixed-valence compound with flat f-electron bands that have a propensity to magnetism. Here, using a realistic Γ8 quartet model, we investigate the dynamical spin susceptibility and describe the in-gap collective mode observed in neutron scattering experiments. We show that as the Sm valence increases with pressure, the magnetic correlations enhance and SmB6 undergoes a first-order phase transition into a metallic antiferromagnetic state, whose symmetry depends on the model parameters. The magnetic orderings give rise to distinct band topologies: while the A-type order leads to an overlap between valence and conduction bands in the form of Dirac nodal lines, the G-type order has a negative indirect gap with weak Z2 indices. We also consider the spin polarized phase under a strong magnetic field, and find that it exhibits Weyl points as well as nodal lines close to the Fermi level. The magnetic phases show markedly different surface states and tunable bulk transport properties, with important implications for experiments. Our theory predicts that a magnetic order can be stabilized also by lifting the Γ8 cubic symmetry, thus explaining the surface magnetism reported in SmB6.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/14610
dc.identifier.urihttps://doi.org/10.34657/13641
dc.language.isoeng
dc.publisherCollege Park, MD : APS
dc.relation.doihttps://doi.org/10.1103/physrevresearch.5.l042028
dc.relation.essn2643-1564
dc.rights.licenseCC BY 4.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.subject.ddc530
dc.subject.otherAntiferromagnetismeng
dc.subject.otherBoron compoundseng
dc.subject.otherMagnetic susceptibilityeng
dc.subject.otherNeutron scatteringeng
dc.subject.otherSamarium compoundseng
dc.subject.otherCollective modeseng
dc.subject.otherElectron bandseng
dc.subject.otherF-electronseng
dc.subject.otherFirst-order phase transitionseng
dc.subject.otherMagnetic correlationeng
dc.subject.otherMixed valence compoundseng
dc.subject.otherNeutron scattering experimentseng
dc.subject.otherNodal lineeng
dc.subject.otherSpin susceptibilityeng
dc.subject.otherTopological phaseeng
dc.subject.otherTopologyeng
dc.titleCorrelation induced magnetic topological phases in the mixed-valence compound SmB6eng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccess
wgl.contributorIFWD
wgl.subjectPhysikger
wgl.typeZeitschriftenartikelger
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