# Unusual magnetotransport in twisted bilayer graphene from strain-induced open Fermi surfaces https://mdr.nims.go.jp/datasets/a379ab4d-c607-44bf-9bfe-7d69e5b8885b ## File - [pnas.2307151120.pdf](https://mdr.nims.go.jp/filesets/823cd107-84fd-4ab7-bbd0-a8d1daad78a6/download) ([Detail](https://mdr.nims.go.jp/filesets/823cd107-84fd-4ab7-bbd0-a8d1daad78a6.md)) ## Id a379ab4d-c607-44bf-9bfe-7d69e5b8885b ## Local identifier ## Visibility open_to_public ## State published ## Created at 2025-02-18T02:04:24.182729Z ## Updated at 2025-02-23T13:46:58.490610Z ## Published at 2025-02-23T13:46:59.020136Z ## Doi ## First published url https://doi.org/10.1073/pnas.2307151120 ## Date published 2023-08-22 ## Recorded date published 2023-8-22 ## Resource type journal_article ## Manuscript type vor ## Collection ## Title - title: Unusual magnetotransport in twisted bilayer graphene from strain-induced open Fermi surfaces title_type: original lang: en ## Description - description: Anisotropic hopping in a toy Hofstadter model was recently invoked to explain a rich and surprising Landau spectrum measured in twisted bilayer graphene away from the magic angle. Suspecting that such anisotropy could arise from unintended uniaxial strain, we extend the Bistritzer-MacDonald model to include uniaxial heterostrain. We find that such strain strongly influences band structure, shifting the three otherwise-degenerate van Hove points to different energies. Coupled to a Boltzmann magnetotransport calculation, this reproduces previously-unexplained non-saturating B2 magnetoresistance, and predicts subtler features that had not been noticed in the experimental data. In contrast to these distinctive signatures in longitudinal resistivity, the Hall coefficient is barely influenced by strain, to the extent that it still shows a single sign change on each side of the charge neutrality point. The theory also predicts a marked rotation of the electrical transport principal axes with changing of filling even for fixed strain and for rigid bands. Such filling-dependent rotations have led researchers to reject strain as a cause, instead invoking electronic nematic order. description_type: abstract lang: und ## Creator - name: Xiaoyu Wang role: author - name: Joe Finney role: author - name: Aaron L. Sharpe role: author - name: Linsey K. Rodenbach role: author - name: Connie L. Hsueh role: author - name: Kenji Watanabe role: author orcid: https://orcid.org/0000-0003-3701-8119 organization: National Institute for Materials Science ror: https://ror.org/026v1ze26 - name: Takashi Taniguchi role: author orcid: https://orcid.org/0000-0002-1467-3105 organization: National Institute for Materials Science ror: https://ror.org/026v1ze26 - name: M. A. Kastner role: author - name: Oskar Vafek role: author - name: David Goldhaber-Gordon role: author ## Contact agent ## Publisher organization: Proceedings of the National Academy of Sciences ## Managing organization ## Keyword - subject: Uniaxial strain schema: not_defined - subject: band structure schema: not_defined - subject: magnetotransport schema: not_defined ## Rights - identifier: https://creativecommons.org/licenses/by/4.0/ ## Other identifier(s) ## Data origin ## Embargo ## Journal - title: Proceedings of the National Academy of Sciences issn: '10916490' volume: '120' issue: '34' article_number: e2307151120 ## Conference ## Related item ## Funding - identifier: DMR-1916958 funder_name: NSF | MPS | Division of Materials Research - identifier: DE-AC02-76SF00515 funder_name: DOE | SC | Basic Energy Sciences - identifier: DE-AC02-76SF00515 funder_name: DOE | SC | Basic Energy Sciences - identifier: '11070' funder_name: Gordon and Betty Moore Foundation - identifier: DE-AC02-76SF00515 funder_name: DOE | SC | Basic Energy Sciences - identifier: DE-AC02-76SF00515 funder_name: DOE | SC | Basic Energy Sciences - identifier: DE-AC02-76SF00515 funder_name: DOE | SC | Basic Energy Sciences - identifier: DE-AC02-76SF00515 funder_name: DOE | SC | Basic Energy Sciences - identifier: '9460' funder_name: Gordon and Betty Moore Foundation - identifier: '9460' funder_name: Gordon and Betty Moore Foundation - identifier: '9460' funder_name: Gordon and Betty Moore Foundation - identifier: '9460' funder_name: Gordon and Betty Moore Foundation - identifier: EECS-2026822 funder_name: NSF | Directorate for Engineering - identifier: EECS-2026822 funder_name: NSF | Directorate for Engineering - identifier: EECS-2026822 funder_name: NSF | Directorate for Engineering - identifier: KAKENHI-21H05233 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: EECS-2026822 funder_name: NSF | Directorate for Engineering - identifier: EECS-2026822 funder_name: NSF | Directorate for Engineering - identifier: KAKENHI-19H05790 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: KAKENHI-19H05790 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: KAKENHI-20H00354 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: KAKENHI-20H00354 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: KAKENHI-21H05233 funder_name: MEXT | Japan Society for the Promotion of Science - identifier: DMR-1157490 funder_name: NSF | MPS | Division of Materials Research - identifier: '9460' funder_name: Gordon and Betty Moore Foundation ## 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: 823cd107-84fd-4ab7-bbd0-a8d1daad78a6 filename: pnas.2307151120.pdf content_type: application/pdf size: 3034462 md5: a8cfc251d9290cba646988ab4890faf8 ## Thumbnail fileset_id: 823cd107-84fd-4ab7-bbd0-a8d1daad78a6 filename: pnas.2307151120.pdf