Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling

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dc.citation.articleNumber246601en_US
dc.citation.issueNumber24en_US
dc.citation.journalTitlePhysical Review Lettersen_US
dc.citation.volumeNumber118en_US
dc.contributor.authorDzsaber, S.en_US
dc.contributor.authorProchaska, L.en_US
dc.contributor.authorSidorenko, A.en_US
dc.contributor.authorEguchi, G.en_US
dc.contributor.authorSvagera, R.en_US
dc.contributor.authorWaas, M.en_US
dc.contributor.authorProkofiev, A.en_US
dc.contributor.authorSi, Q.en_US
dc.contributor.authorPaschen, S.en_US
dc.date.accessioned2017-07-25T18:04:13Zen_US
dc.date.available2017-07-25T18:04:13Zen_US
dc.date.issued2017en_US
dc.description.abstractRecent theoretical studies of topologically nontrivial electronic states in Kondo insulators have pointed to the importance of spin-orbit coupling (SOC) for stabilizing these states. However, systematic experimental studies that tune the SOC parameter λ SOC in Kondo insulators remain elusive. The main reason is that variations of (chemical) pressure or doping strongly influence the Kondo coupling J K and the chemical potential μ —both essential parameters determining the ground state of the material—and thus possible λ SOC tuning effects have remained unnoticed. Here, we present the successful growth of the substitution series Ce 3 Bi 4 ( Pt 1 − x Pd x ) 3 ( 0 ≤ x ≤ 1 ) of the archetypal (noncentrosymmetric) Kondo insulator Ce 3 Bi 4 Pt 3 . The Pt-Pd substitution is isostructural, isoelectronic, and isosize, and it therefore is likely to leave J K and μ essentially unchanged. By contrast, the large mass difference between the 5 d element Pt and the 4 d element Pd leads to a large difference in λ SOC , which thus is the dominating tuning parameter in the series. Surprisingly, with increasing x (decreasing λ SOC ), we observe a Kondo insulator to semimetal transition, demonstrating an unprecedented drastic influence of the SOC. The fully substituted end compound Ce 3 Bi 4 Pd 3 shows thermodynamic signatures of a recently predicted Weyl-Kondo semimetal.en_US
dc.identifier.citationDzsaber, S., Prochaska, L., Sidorenko, A., et al.. "Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling." <i>Physical Review Letters,</i> 118, no. 24 (2017) American Physical Society: https://doi.org/10.1103/PhysRevLett.118.246601.en_US
dc.identifier.digitalKondo_Insulatoren_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevLett.118.246601en_US
dc.identifier.urihttps://hdl.handle.net/1911/95220en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleKondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Couplingen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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