Electrically Tunable Gauge Fields in Tiny-Angle Twisted Bilayer Graphene
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevLett.121.146801 http://hdl.handle.net/11449/188170 |
Resumo: | Twisted bilayer graphene has recently attracted a lot of attention for its rich electronic properties and tunability. Here we show that for very small twist angles, α1°, the application of a perpendicular electric field is mathematically equivalent to a new kind of artificial gauge field. This identification opens the door for the generation and detection of pseudo-Landau levels in graphene platforms within robust setups, which do not depend on strain engineering and therefore can be realistically harvested for technological applications. Furthermore, this new artificial gauge field leads to the development of highly localized modes associated with flat bands close to charge neutrality, which form an emergent kagome lattice in real space. Our findings indicate that for tiny angles biased twisted bilayer graphene is a promising platform that can realize frustrated lattices of highly localized states, opening a new direction for the investigation of strongly correlated phases of matter. |
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Electrically Tunable Gauge Fields in Tiny-Angle Twisted Bilayer GrapheneTwisted bilayer graphene has recently attracted a lot of attention for its rich electronic properties and tunability. Here we show that for very small twist angles, α1°, the application of a perpendicular electric field is mathematically equivalent to a new kind of artificial gauge field. This identification opens the door for the generation and detection of pseudo-Landau levels in graphene platforms within robust setups, which do not depend on strain engineering and therefore can be realistically harvested for technological applications. Furthermore, this new artificial gauge field leads to the development of highly localized modes associated with flat bands close to charge neutrality, which form an emergent kagome lattice in real space. Our findings indicate that for tiny angles biased twisted bilayer graphene is a promising platform that can realize frustrated lattices of highly localized states, opening a new direction for the investigation of strongly correlated phases of matter.Institute for Theoretical Studies ETH ZurichInstitute for Theoretical Physics ETH ZurichICTP South American Institute for Fundamental Research Instituto de Física Teórica UNESPICTP South American Institute for Fundamental Research Instituto de Física Teórica UNESPETH ZurichUniversidade Estadual Paulista (Unesp)Ramires, Aline [UNESP]Lado, Jose L.2019-10-06T15:59:33Z2019-10-06T15:59:33Z2018-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevLett.121.146801Physical Review Letters, v. 121, n. 14, 2018.1079-71140031-9007http://hdl.handle.net/11449/18817010.1103/PhysRevLett.121.1468012-s2.0-85054520501Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review Lettersinfo:eu-repo/semantics/openAccess2021-10-23T19:02:01Zoai:repositorio.unesp.br:11449/188170Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T19:02:01Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Electrically Tunable Gauge Fields in Tiny-Angle Twisted Bilayer Graphene |
title |
Electrically Tunable Gauge Fields in Tiny-Angle Twisted Bilayer Graphene |
spellingShingle |
Electrically Tunable Gauge Fields in Tiny-Angle Twisted Bilayer Graphene Ramires, Aline [UNESP] |
title_short |
Electrically Tunable Gauge Fields in Tiny-Angle Twisted Bilayer Graphene |
title_full |
Electrically Tunable Gauge Fields in Tiny-Angle Twisted Bilayer Graphene |
title_fullStr |
Electrically Tunable Gauge Fields in Tiny-Angle Twisted Bilayer Graphene |
title_full_unstemmed |
Electrically Tunable Gauge Fields in Tiny-Angle Twisted Bilayer Graphene |
title_sort |
Electrically Tunable Gauge Fields in Tiny-Angle Twisted Bilayer Graphene |
author |
Ramires, Aline [UNESP] |
author_facet |
Ramires, Aline [UNESP] Lado, Jose L. |
author_role |
author |
author2 |
Lado, Jose L. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
ETH Zurich Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Ramires, Aline [UNESP] Lado, Jose L. |
description |
Twisted bilayer graphene has recently attracted a lot of attention for its rich electronic properties and tunability. Here we show that for very small twist angles, α1°, the application of a perpendicular electric field is mathematically equivalent to a new kind of artificial gauge field. This identification opens the door for the generation and detection of pseudo-Landau levels in graphene platforms within robust setups, which do not depend on strain engineering and therefore can be realistically harvested for technological applications. Furthermore, this new artificial gauge field leads to the development of highly localized modes associated with flat bands close to charge neutrality, which form an emergent kagome lattice in real space. Our findings indicate that for tiny angles biased twisted bilayer graphene is a promising platform that can realize frustrated lattices of highly localized states, opening a new direction for the investigation of strongly correlated phases of matter. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-10-01 2019-10-06T15:59:33Z 2019-10-06T15:59:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevLett.121.146801 Physical Review Letters, v. 121, n. 14, 2018. 1079-7114 0031-9007 http://hdl.handle.net/11449/188170 10.1103/PhysRevLett.121.146801 2-s2.0-85054520501 |
url |
http://dx.doi.org/10.1103/PhysRevLett.121.146801 http://hdl.handle.net/11449/188170 |
identifier_str_mv |
Physical Review Letters, v. 121, n. 14, 2018. 1079-7114 0031-9007 10.1103/PhysRevLett.121.146801 2-s2.0-85054520501 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review Letters |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803046864774234112 |