Theory of intrinsic acoustic plasmons in twisted bilayer graphene
We present a theoretical study of the intrinsic plasmonic properties of twisted bilayer graphene (TBG) as a function of the twist angle ¿ (and other microscopic parameters such as temperature and filling factor). Our calculations, which rely on the random phase approximation, take into account four...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/427278 |
| Acceso en línea: | https://hdl.handle.net/2117/427278 https://dx.doi.org/10.1103/PhysRevB.110.045431 |
| Access Level: | acceso abierto |
| Palabra clave: | Plasmons (Physics) Graphene Electron gas Plasmons (Física) Grafè Gas d'electrons Àrees temàtiques de la UPC::Física::Física de partícules |
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Theory of intrinsic acoustic plasmons in twisted bilayer grapheneCavicchi, LorenzoTorre, Iacopo|||0000-0001-6515-181XJarillo Herrero, PabloKoppens, FrankPolini, MarcoPlasmons (Physics)GrapheneElectron gasPlasmons (Física)GrafèGas d'electronsÀrees temàtiques de la UPC::Física::Física de partículesWe present a theoretical study of the intrinsic plasmonic properties of twisted bilayer graphene (TBG) as a function of the twist angle ¿ (and other microscopic parameters such as temperature and filling factor). Our calculations, which rely on the random phase approximation, take into account four crucially important effects, which are treated on equal footing: (i) the layer-pseudospin degree of freedom, (ii) spatial nonlocality of the density-density response function, (iii) crystalline local field effects, and (iv) Hartree self-consistency. We show that the plasmonic spectrum of TBG displays a smooth transition from a strongly coupled regime (at twist angles ¿¿2°), where the low-energy spectrum is dominated by a weakly dispersive intraband plasmon, to a weakly coupled regime (for twist angles ¿¿2°) where an acoustic plasmon clearly emerges. This crossover offers the possibility of realizing tunable mid-infrared subwavelength cavities, whose vacuum fluctuations may be used to manipulate the ground state of strongly correlated electron systems.This work was supported by (i) the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 881603 - GrapheneCore3 and the Marie Sklodowska-Curie Grant Agreement No. 873028 and (ii) the Italian Minister of University and Research (MUR) under the “Research projects of relevant national interest - PRIN 2020” - Project No. 2020JLZ52N, title “Light-matter interactions and the collective behavior of quantum 2D materials (q-LIMA)”. P.J.H. acknowledges support by the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant No. GBMF9463, the Fundacion Ramon Areces, and the ICFO Distinguished Visiting Professor program. F.H.L.K. acknowledges financial support from the ERC TOPONANOP (726001), the Government of Catalonia trough the SGR grant, the Spanish Ministry of Economy and Competitiveness through the Severo Ochoa Programme for Centres of Excellence in R&D (Ref. SEV-2015-0522) and Explora Ciencia (Ref. FIS2017- 91599-EXP), Fundacio Cellex Barcelona, Generalitat de Catalunya through the CERCA program, the Mineco grant Plan Nacional (Ref. FIS2016-81044-P), and the Agency for Management of University and Research Grants (AGAUR) (Ref. 2017-SGR-1656).Peer ReviewedAmerican Physical Society (APS)20242024-07-1920252025-03-31journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/427278https://dx.doi.org/10.1103/PhysRevB.110.045431reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengEuropean Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 881603 Graphene Flagship Core Project 3European Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 873028 Hydrodynamic electronicsopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4272782026-05-27T15:37:01Z |
| dc.title.none.fl_str_mv |
Theory of intrinsic acoustic plasmons in twisted bilayer graphene |
| title |
Theory of intrinsic acoustic plasmons in twisted bilayer graphene |
| spellingShingle |
Theory of intrinsic acoustic plasmons in twisted bilayer graphene Cavicchi, Lorenzo Plasmons (Physics) Graphene Electron gas Plasmons (Física) Grafè Gas d'electrons Àrees temàtiques de la UPC::Física::Física de partícules |
| title_short |
Theory of intrinsic acoustic plasmons in twisted bilayer graphene |
| title_full |
Theory of intrinsic acoustic plasmons in twisted bilayer graphene |
| title_fullStr |
Theory of intrinsic acoustic plasmons in twisted bilayer graphene |
| title_full_unstemmed |
Theory of intrinsic acoustic plasmons in twisted bilayer graphene |
| title_sort |
Theory of intrinsic acoustic plasmons in twisted bilayer graphene |
| dc.creator.none.fl_str_mv |
Cavicchi, Lorenzo Torre, Iacopo|||0000-0001-6515-181X Jarillo Herrero, Pablo Koppens, Frank Polini, Marco |
| author |
Cavicchi, Lorenzo |
| author_facet |
Cavicchi, Lorenzo Torre, Iacopo|||0000-0001-6515-181X Jarillo Herrero, Pablo Koppens, Frank Polini, Marco |
| author_role |
author |
| author2 |
Torre, Iacopo|||0000-0001-6515-181X Jarillo Herrero, Pablo Koppens, Frank Polini, Marco |
| author2_role |
author author author author |
| dc.subject.none.fl_str_mv |
Plasmons (Physics) Graphene Electron gas Plasmons (Física) Grafè Gas d'electrons Àrees temàtiques de la UPC::Física::Física de partícules |
| topic |
Plasmons (Physics) Graphene Electron gas Plasmons (Física) Grafè Gas d'electrons Àrees temàtiques de la UPC::Física::Física de partícules |
| description |
We present a theoretical study of the intrinsic plasmonic properties of twisted bilayer graphene (TBG) as a function of the twist angle ¿ (and other microscopic parameters such as temperature and filling factor). Our calculations, which rely on the random phase approximation, take into account four crucially important effects, which are treated on equal footing: (i) the layer-pseudospin degree of freedom, (ii) spatial nonlocality of the density-density response function, (iii) crystalline local field effects, and (iv) Hartree self-consistency. We show that the plasmonic spectrum of TBG displays a smooth transition from a strongly coupled regime (at twist angles ¿¿2°), where the low-energy spectrum is dominated by a weakly dispersive intraband plasmon, to a weakly coupled regime (for twist angles ¿¿2°) where an acoustic plasmon clearly emerges. This crossover offers the possibility of realizing tunable mid-infrared subwavelength cavities, whose vacuum fluctuations may be used to manipulate the ground state of strongly correlated electron systems. |
| publishDate |
2024 |
| dc.date.none.fl_str_mv |
2024 2024-07-19 2025 2025-03-31 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 AM http://purl.org/coar/version/c_ab4af688f83e57aa |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2117/427278 https://dx.doi.org/10.1103/PhysRevB.110.045431 |
| url |
https://hdl.handle.net/2117/427278 https://dx.doi.org/10.1103/PhysRevB.110.045431 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.relation.none.fl_str_mv |
European Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 881603 Graphene Flagship Core Project 3 European Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 873028 Hydrodynamic electronics |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
American Physical Society (APS) |
| publisher.none.fl_str_mv |
American Physical Society (APS) |
| dc.source.none.fl_str_mv |
reponame:UPCommons. Portal del coneixement obert de la UPC instname:Universitat Politècnica de Catalunya (UPC) |
| instname_str |
Universitat Politècnica de Catalunya (UPC) |
| reponame_str |
UPCommons. Portal del coneixement obert de la UPC |
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UPCommons. Portal del coneixement obert de la UPC |
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| repository.mail.fl_str_mv |
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1869414872269193216 |
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15,812455 |