Giant spontaneous Hall effect in a nonmagnetic Weyl–Kondo semimetal

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dc.citation.articleNumbere2013386118
dc.citation.issueNumber8
dc.citation.journalTitleProceedings of the National Academy of Sciences
dc.citation.volumeNumber118
dc.contributor.authorDzsaber, Sami
dc.contributor.authorYan, Xinlin
dc.contributor.authorTaupin, Mathieu
dc.contributor.authorEguchi, Gaku
dc.contributor.authorProkofiev, Andrey
dc.contributor.authorShiroka, Toni
dc.contributor.authorBlaha, Peter
dc.contributor.authorRubel, Oleg
dc.contributor.authorGrefe, Sarah E.
dc.contributor.authorLai, Hsin-Hua
dc.contributor.authorSi, Qimiao
dc.contributor.authorPaschen, Silke
dc.contributor.orgRice Center for Quantum Materials
dc.date.accessioned2021-03-12T21:00:04Z
dc.date.available2021-03-12T21:00:04Z
dc.date.issued2021
dc.description.abstractNontrivial topology in condensed-matter systems enriches quantum states of matter to go beyond either the classification into metals and insulators in terms of conventional band theory or that of symmetry-broken phases by Landau’s order parameter framework. So far, focus has been on weakly interacting systems, and little is known about the limit of strong electron correlations. Heavy fermion systems are a highly versatile platform to explore this regime. Here we report the discovery of a giant spontaneous Hall effect in the Kondo semimetal Ce3Bi4Pd3 that is noncentrosymmetric but preserves time-reversal symmetry. We attribute this finding to Weyl nodes—singularities of the Berry curvature—that emerge in the immediate vicinity of the Fermi level due to the Kondo interaction. We stress that this phenomenon is distinct from the previously detected anomalous Hall effect in materials with broken time-reversal symmetry; instead, it manifests an extreme topological response that requires a beyond-perturbation-theory description of the previously proposed nonlinear Hall effect. The large magnitude of the effect in even tiny electric and zero magnetic fields as well as its robust bulk nature may aid the exploitation in topological quantum devices.
dc.identifier.citationDzsaber, Sami, Yan, Xinlin, Taupin, Mathieu, et al.. "Giant spontaneous Hall effect in a nonmagnetic Weyl–Kondo semimetal." <i>Proceedings of the National Academy of Sciences,</i> 118, no. 8 (2021) PNAS: https://doi.org/10.1073/pnas.2013386118.
dc.identifier.digitale2013386118-full
dc.identifier.doihttps://doi.org/10.1073/pnas.2013386118
dc.identifier.urihttps://hdl.handle.net/1911/110171
dc.language.isoeng
dc.publisherPNAS
dc.rightsThis open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleGiant spontaneous Hall effect in a nonmagnetic Weyl–Kondo semimetal
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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