Magic-angle helical trilayer graphene
We propose magic-angle helical trilayer graphene (HTG), a helical structure featuring identical rotation angles between three consecutive layers of graphene, as a unique and experimentally accessible platform for realizing exotic correlated topological states of matter. While nominally forming a sup...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en_US |
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American Association for the Advancement of Science
2024
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| Online Access: | https://hdl.handle.net/1721.1/153511 |
| _version_ | 1811098013814226944 |
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| author | Devakul, Trithep Ledwith, Patrick J. Xia, Li-Qiao Uri, Aviram de la Barrera, Sergio C. Jarillo-Herrero, Pablo Fu, Liang |
| author_facet | Devakul, Trithep Ledwith, Patrick J. Xia, Li-Qiao Uri, Aviram de la Barrera, Sergio C. Jarillo-Herrero, Pablo Fu, Liang |
| author_sort | Devakul, Trithep |
| collection | MIT |
| description | We propose magic-angle helical trilayer graphene (HTG), a helical structure featuring identical rotation angles between three consecutive layers of graphene, as a unique and experimentally accessible platform for realizing exotic correlated topological states of matter. While nominally forming a supermoiré (or moiré-of-moiré) structure, we show that HTG locally relaxes into large regions of a periodic single-moiré structure realizing flat topological bands carrying nontrivial valley Chern number. These bands feature near-ideal quantum geometry and are isolated from remote bands by a very large energy gap, making HTG a promising platform for experimental realization of correlated topological states such as integer and fractional quantum anomalous Hall states. |
| first_indexed | 2024-09-23T17:08:34Z |
| format | Article |
| id | mit-1721.1/153511 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T17:08:34Z |
| publishDate | 2024 |
| publisher | American Association for the Advancement of Science |
| record_format | dspace |
| spelling | mit-1721.1/1535112024-02-14T03:01:01Z Magic-angle helical trilayer graphene Devakul, Trithep Ledwith, Patrick J. Xia, Li-Qiao Uri, Aviram de la Barrera, Sergio C. Jarillo-Herrero, Pablo Fu, Liang Multidisciplinary We propose magic-angle helical trilayer graphene (HTG), a helical structure featuring identical rotation angles between three consecutive layers of graphene, as a unique and experimentally accessible platform for realizing exotic correlated topological states of matter. While nominally forming a supermoiré (or moiré-of-moiré) structure, we show that HTG locally relaxes into large regions of a periodic single-moiré structure realizing flat topological bands carrying nontrivial valley Chern number. These bands feature near-ideal quantum geometry and are isolated from remote bands by a very large energy gap, making HTG a promising platform for experimental realization of correlated topological states such as integer and fractional quantum anomalous Hall states. 2024-02-13T16:45:11Z 2024-02-13T16:45:11Z 2023-09-08 Article http://purl.org/eprint/type/JournalArticle 2375-2548 https://hdl.handle.net/1721.1/153511 Trithep Devakul et al. ,Magic-angle helical trilayer graphene.Sci. Adv.9,eadi6063(2023). en_US 10.1126/sciadv.adi6063 Creative Commons Attribution-Noncommercial http://creativecommons.org/licenses/by-nc application/pdf American Association for the Advancement of Science American Association for the Advancement of Science |
| spellingShingle | Multidisciplinary Devakul, Trithep Ledwith, Patrick J. Xia, Li-Qiao Uri, Aviram de la Barrera, Sergio C. Jarillo-Herrero, Pablo Fu, Liang Magic-angle helical trilayer graphene |
| title | Magic-angle helical trilayer graphene |
| title_full | Magic-angle helical trilayer graphene |
| title_fullStr | Magic-angle helical trilayer graphene |
| title_full_unstemmed | Magic-angle helical trilayer graphene |
| title_short | Magic-angle helical trilayer graphene |
| title_sort | magic angle helical trilayer graphene |
| topic | Multidisciplinary |
| url | https://hdl.handle.net/1721.1/153511 |
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