Giant spontaneous Hall effect in a nonmagnetic Weyl–Kondo semimetal

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dc.citation.articleNumbere2013386118en_US
dc.citation.issueNumber8en_US
dc.citation.journalTitleProceedings of the National Academy of Sciencesen_US
dc.citation.volumeNumber118en_US
dc.contributor.authorDzsaber, Samien_US
dc.contributor.authorYan, Xinlinen_US
dc.contributor.authorTaupin, Mathieuen_US
dc.contributor.authorEguchi, Gakuen_US
dc.contributor.authorProkofiev, Andreyen_US
dc.contributor.authorShiroka, Tonien_US
dc.contributor.authorBlaha, Peteren_US
dc.contributor.authorRubel, Olegen_US
dc.contributor.authorGrefe, Sarah E.en_US
dc.contributor.authorLai, Hsin-Huaen_US
dc.contributor.authorSi, Qimiaoen_US
dc.contributor.authorPaschen, Silkeen_US
dc.contributor.orgRice Center for Quantum Materialsen_US
dc.date.accessioned2021-03-12T21:00:04Zen_US
dc.date.available2021-03-12T21:00:04Zen_US
dc.date.issued2021en_US
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.en_US
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.en_US
dc.identifier.digitale2013386118-fullen_US
dc.identifier.doihttps://doi.org/10.1073/pnas.2013386118en_US
dc.identifier.urihttps://hdl.handle.net/1911/110171en_US
dc.language.isoengen_US
dc.publisherPNASen_US
dc.rightsThis open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).en_US
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.titleGiant spontaneous Hall effect in a nonmagnetic Weyl–Kondo semimetalen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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