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dc.contributor.authorSuetsugu, S.
dc.contributor.authorKitagawa, K.
dc.contributor.authorKariyado, T.
dc.contributor.authorRost, A. W.
dc.contributor.authorNuss, J.
dc.contributor.authorMühle, C.
dc.contributor.authorOgata, M.
dc.contributor.authorTakagi, H.
dc.identifier.citationSuetsugu , S , Kitagawa , K , Kariyado , T , Rost , A W , Nuss , J , Mühle , C , Ogata , M & Takagi , H 2021 , ' Giant orbital diamagnetism of three-dimensional Dirac electrons in Sr 3 PbO antiperovskite ' , Physical Review B , vol. 103 , no. 11 , 115117 .
dc.identifier.otherPURE: 273263526
dc.identifier.otherPURE UUID: a2f6974a-c254-4da1-9c36-f795764ba6cd
dc.identifier.othercrossref: 10.1103/PhysRevB.103.115117
dc.identifier.otherScopus: 85102705465
dc.identifier.otherWOS: 000627559800002
dc.descriptionThis work was supported by Japan Society for the Promotion of Science (JSPS) KAKENHI (Grants No. 24224010, No. 15K13523, No. JP15H05852, No. JP15K21717,, No. 17H01140, No. 18H01162, and No. 17J05243), JSPS Core-to-Core Program (A) Advanced Research Networks, and the Alexander von Humboldt Foundation. S.S. acknowledges financial support by JSPS and the Materials Education program for the future leaders in Research, Industry, and Technology (MERIT).en
dc.description.abstractIn Dirac semimetals, interband mixing has been known theoretically to give rise to a giant orbital diamagnetism when the Fermi level is close to the Dirac point. In Bi1−xSbx and other Dirac semimetals, an enhanced diamagnetism in the magnetic susceptibility χ has been observed and interpreted as a manifestation of such giant orbital diamagnetism. Experimentally proving their orbital origin, however, has remained challenging. The cubic antiperovskite Sr3PbO is a three-dimensional Dirac electron system and shows the giant diamagnetism in χ as in the other Dirac semimetals. 207Pb NMR measurements are conducted in this study to explore the microscopic origin of diamagnetism. From the analysis of the Knight shift K as a function of χ  and the relaxation rate T1–1 for samples with different hole densities, the spin and the orbital components in K are successfully separated. The results establish that the enhanced diamagnetism in Sr3PbO originates from the orbital contribution of Dirac electrons, which is fully consistent with the theory of giant orbital diamagnetism.
dc.relation.ispartofPhysical Review Ben
dc.rightsCopyright © 2021. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by the Max Planck Society.en
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleGiant orbital diamagnetism of three-dimensional Dirac electrons in Sr3PbO antiperovskiteen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.Centre for Designer Quantum Materialsen
dc.description.statusPeer revieweden

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