Higher-order topology in bismuth
DC Field | Value | Language |
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dc.contributor.author | Schindler, Frank | - |
dc.contributor.author | Wang, Zhijun | - |
dc.contributor.author | Vergniory, Maia G. | - |
dc.contributor.author | Cook, Ashley M. | - |
dc.contributor.author | Murani, Anil | - |
dc.contributor.author | Sengupta, Shamashis | - |
dc.contributor.author | Kasumov, Alik Yu. | - |
dc.contributor.author | Deblock, Richard | - |
dc.contributor.author | Jeon, Sangjun | - |
dc.contributor.author | Drozdov, Ilya | - |
dc.contributor.author | Bouchiat, Helene | - |
dc.contributor.author | Gueron, Sophie | - |
dc.contributor.author | Yazdani, Ali | - |
dc.contributor.author | Bernevig, B. Andrei | - |
dc.contributor.author | Neupert, Titus | - |
dc.date.accessioned | 2022-04-27T06:42:47Z | - |
dc.date.available | 2022-04-27T06:42:47Z | - |
dc.date.issued | 2018-09 | - |
dc.identifier.issn | 1745-2473 | - |
dc.identifier.issn | 1745-2481 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/56926 | - |
dc.description.abstract | The mathematical field of topology has become a framework in which to describe the low-energy electronic structure of crystalline solids. Typical of a bulk insulating three-dimensional topological crystal are conducting two-dimensional surface states. This constitutes the topological bulk-boundary correspondence. Here, we establish that the electronic structure of bismuth, an element consistently described as bulk topologically trivial, is in fact topological and follows a generalized bulk-boundary correspondence of higher-order: not the surfaces of the crystal, but its hinges host topologically protected conducting modes. These hinge modes are protected against localization by time-reversal symmetry locally, and globally by the three-fold rotational symmetry and inversion symmetry of the bismuth crystal. We support our claim theoretically and experimentally. Our theoretical analysis is based on symmetry arguments, topological indices, first-principles calculations, and the recently introduced framework of topological quantum chemistry. We provide supporting evidence from two complementary experimental techniques. With scanning-tunnelling spectroscopy, we probe the signatures of the rotational symmetry of the one-dimensional states located at the step edges of the crystal surface. With Josephson interferometry, we demonstrate their universal topological contribution to the electronic transport. Our work establishes bismuth as a higher-order topological insulator. | - |
dc.format.extent | 7 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | NATURE PUBLISHING GROUP | - |
dc.title | Higher-order topology in bismuth | - |
dc.type | Article | - |
dc.identifier.doi | 10.1038/s41567-018-0224-7 | - |
dc.identifier.bibliographicCitation | NATURE PHYSICS, v.14, no.9, pp 918 - 924 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.wosid | 000443584000023 | - |
dc.identifier.scopusid | 2-s2.0-85051132091 | - |
dc.citation.endPage | 924 | - |
dc.citation.number | 9 | - |
dc.citation.startPage | 918 | - |
dc.citation.title | NATURE PHYSICS | - |
dc.citation.volume | 14 | - |
dc.type.docType | Article | - |
dc.publisher.location | 영국 | - |
dc.subject.keywordPlus | GENERALIZED GRADIENT APPROXIMATION | - |
dc.subject.keywordPlus | QUANTIZED HALL CONDUCTANCE | - |
dc.subject.keywordPlus | CRYSTALLINE INSULATOR | - |
dc.subject.keywordPlus | EXPERIMENTAL REALIZATION | - |
dc.subject.keywordPlus | PHASE-TRANSITION | - |
dc.subject.keywordPlus | EDGE STATES | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Physics, Multidisciplinary | - |
dc.description.journalRegisteredClass | sci | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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