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dc.contributor.authorDzsaber, S.
Prochaska, L.
Sidorenko, A.
Eguchi, G.
Svagera, R.
Waas, M.
Prokofiev, A.
Si, Q.
Paschen, S.
dc.date.accessioned 2017-07-25T18:04:13Z
dc.date.available 2017-07-25T18:04:13Z
dc.date.issued 2017
dc.identifier.citation Dzsaber, S., Prochaska, L., Sidorenko, A., et al.. "Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling." Physical Review Letters, 118, no. 24 (2017) https://doi.org/10.1103/PhysRevLett.118.246601.
dc.identifier.urihttp://hdl.handle.net/1911/95220
dc.description.abstract Recent 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.
dc.language.iso eng
dc.title Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling
dc.type Journal article
dc.citation.journalTitle Physical Review Letters
dc.citation.volumeNumber 118
dc.citation.issueNumber 24
dc.identifier.digital Kondo_Insulator
dc.contributor.publisher American Physical Society
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1103/PhysRevLett.118.246601
dc.type.publication publisher version
dc.citation.articleNumber 246601


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