# Correlated insulator and Chern insulators in pentalayer rhombohedral-stacked graphene https://mdr.nims.go.jp/datasets/3ff37913-5284-4995-90d0-3d36cf365a56 ## File - [2024A00216G_CI accepted manuscript.pdf](https://mdr.nims.go.jp/filesets/ac129eb0-7d3a-471b-b6f8-fcea8183ae0e/download) ([Detail](https://mdr.nims.go.jp/filesets/ac129eb0-7d3a-471b-b6f8-fcea8183ae0e.md)) ## Id 3ff37913-5284-4995-90d0-3d36cf365a56 ## Local identifier ## Visibility open_to_public ## State published ## Created at 2025-08-29T05:21:40.264573Z ## Updated at 2025-09-01T23:30:26.305965Z ## Published at 2025-09-01T23:17:16.795095Z ## Doi ## First published url https://doi.org/10.1038/s41565-023-01520-1 ## Date published 2023-10-05 ## Recorded date published 2024-2 ## Resource type journal_article ## Manuscript type accepted_manuscript ## Collection ## Title - title: Correlated insulator and Chern insulators in pentalayer rhombohedral-stacked graphene title_type: original lang: en ## Description - description: Rhombohedral stacked multilayer graphene hosts a pair of flat bands touching at zero energy, which should give rise to correlated electron phenomena that can be further tuned by an electric field. Furthermore, when electron correlation breaks the isospin symmetry, the valley-dependent Berry phase at zero energy may give rise to topologically non-trivial states. Here, we measure electron transport through hBN-encapsulated pentalayer graphene down to 100 mK. We observed a correlated insulating state with resistance R>MΩ at charge density n=0 and displacement field D=0. Tight-binding calculations predict a metallic ground state under these conditions. By increasing D, we observed a Chern insulator state with C = -5 and two other states with C = -3 at magnetic field around 1 T. At high D and n, we observed isospin-polarized quarter- and half-metals. Hence, rhombohedral pentalayer graphene exhibits two different types of Fermi-surface instabilities, one driven by a pair of flat bands touching at zero energy, and one induced by the Stoner mechanism in a single flat band. Our results establish rhombohedral multilayer graphene as suitable system to explore intertwined electron correlation and topology phenomena in natural graphitic materials without the need for moiré superlattice engineering. description_type: abstract lang: en ## Creator - name: Tonghang Han role: author - name: Zhengguang Lu role: author - name: Giovanni Scuri role: author - name: Jiho Sung role: author - name: Jue Wang role: author - name: Tianyi Han role: author - name: Kenji Watanabe role: author orcid: https://orcid.org/0000-0003-3701-8119 organization: National Institute for Materials Science - name: Takashi Taniguchi role: author orcid: https://orcid.org/0000-0002-1467-3105 organization: National Institute for Materials Science - name: Hongkun Park role: author - name: Long Ju role: author ## Contact agent ## Publisher organization: Springer Science and Business Media LLC ## Managing organization ## Keyword - subject: Rhombohedral multilayer graphene schema: not_defined - subject: Flat bands schema: not_defined - subject: Chern insulator schema: not_defined ## Rights - description: 'This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1038/s41565-023-01520-1' identifier: http://rightsstatements.org/vocab/InC/1.0/ ## Other identifier(s) ## Data origin - data_origin_type: other ## Embargo start_date: 2023-10-05 end_date: 2024-04-05 ## Journal - title: Nature Nanotechnology issn: '17483395' volume: '19' issue: '2' start_page: 181 end_page: 187 ## Conference ## Related item ## Funding - identifier: 20H00354 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: 21H05233 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: 23H02052 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: 20H00354 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: 21H05233 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: DMR-2225925 funder_name: National Science Foundation - identifier: DMR-1231319 funder_name: National Science Foundation - identifier: DMR-2128556* funder_name: National Science Foundation - identifier: '2225925' funder_name: National Science Foundation - identifier: '2225925' funder_name: National Science Foundation - identifier: PHY-1506284 funder_name: National Science Foundation - identifier: PHY-1506284 funder_name: National Science Foundation - identifier: PHY-1506284 funder_name: National Science Foundation - identifier: '2225925' funder_name: National Science Foundation - identifier: PHY-1506284 funder_name: National Science Foundation - identifier: FA9550-21-1-0216 funder_name: United States Department of Defense | United States Air Force | AFMC | Air Force Office of Scientific Research - identifier: FA9550-21-1-0216 funder_name: United States Department of Defense | United States Air Force | AFMC | Air Force Office of Scientific Research - identifier: FA9550-21-1-0216 funder_name: United States Department of Defense | United States Air Force | AFMC | Air Force Office of Scientific Research - identifier: FA9550-21-1-0216 funder_name: United States Department of Defense | United States Air Force | AFMC | Air Force Office of Scientific Research - identifier: 23H02052 funder_name: MEXT | Japan Society for the Promotion of Science ## Instrument ## Instrument operator ## Instrument managing organization ## Measurement method ## Specimen ## Chemical composition ## Structure for specimen ## Structural feature for specimen ## Specific property for specimen ## Process for specimen treatment ## Computational method ## Energy level/transition state ## Software ## Custom property ## Fileset - id: ac129eb0-7d3a-471b-b6f8-fcea8183ae0e filename: 2024A00216G_CI accepted manuscript.pdf content_type: application/pdf size: 1585994 md5: e7e11cd1a2eeb88e8bf20450d45efd45 ## Thumbnail fileset_id: ac129eb0-7d3a-471b-b6f8-fcea8183ae0e filename: 2024A00216G_CI accepted manuscript.pdf