Absorption and optical selection rules of tunable excitons in biased bilayer graphene

Detalhes bibliográficos
Autor(a) principal: Henriques, J. C. G.
Data de Publicação: 2022
Outros Autores: Epstein, Itai, Peres, N. M. R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/1822/78280
Resumo: Biased bilayer graphene, with its easily tunable band gap, presents itself as the ideal system to explore the excitonic effect in graphene-based systems. In this paper we study the excitonic optical response of such a system by combining a tight-binding model with the solution of the Bethe-Salpeter equation, the latter being solved in a semianalytical manner, requiring a single numerical quadrature, thus allowing for a transparent calculation. With our approach we start by analytically obtaining the optical selection rules, followed by the computation of the absorption spectrum for the case of a biased bilayer encapsulated in hexagonal boron nitride, a system which has been the subject of a recent experimental study. Excellent agreement is seen when we compare our theoretical prediction with the experimental data.
id RCAP_0cc35ac78da4977e28a29507e28684fd
oai_identifier_str oai:repositorium.sdum.uminho.pt:1822/78280
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Absorption and optical selection rules of tunable excitons in biased bilayer grapheneCiências Naturais::Ciências FísicasScience & TechnologyBiased bilayer graphene, with its easily tunable band gap, presents itself as the ideal system to explore the excitonic effect in graphene-based systems. In this paper we study the excitonic optical response of such a system by combining a tight-binding model with the solution of the Bethe-Salpeter equation, the latter being solved in a semianalytical manner, requiring a single numerical quadrature, thus allowing for a transparent calculation. With our approach we start by analytically obtaining the optical selection rules, followed by the computation of the absorption spectrum for the case of a biased bilayer encapsulated in hexagonal boron nitride, a system which has been the subject of a recent experimental study. Excellent agreement is seen when we compare our theoretical prediction with the experimental data.N.M.R.P. acknowledges support from the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UIDB/04650/2020. J.C.G.H. acknowledges the Center of Physics for a grant funded by the UIDB/04650/2020 strategic project. N.M.R.P. also acknowledges support from the European Commission through the project Graphene Driven Revolutions in ICT and Beyond (Ref. No. 881603, CORE 3), COMPETE 2020, PORTUGAL 2020, FEDER, and the FCT through projects POCI-01-0145-FEDER-028114, POCI-01-0145-FEDER-02888, and PTDC/NANOPT/29265/2017.American Physical SocietyUniversidade do MinhoHenriques, J. C. G.Epstein, ItaiPeres, N. M. R.20222022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/78280engHenriques, J. C. G., Epstein, I., & Peres, N. M. R. (2022). Absorption and optical selection rules of tunable excitons in biased bilayer graphene. Physical Review B, 105(4), 045411. doi: 10.1103/PhysRevB.105.0454112469-995010.1103/PhysRevB.105.045411https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.045411info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T11:56:48Zoai:repositorium.sdum.uminho.pt:1822/78280Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:46:28.783435Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Absorption and optical selection rules of tunable excitons in biased bilayer graphene
title Absorption and optical selection rules of tunable excitons in biased bilayer graphene
spellingShingle Absorption and optical selection rules of tunable excitons in biased bilayer graphene
Henriques, J. C. G.
Ciências Naturais::Ciências Físicas
Science & Technology
title_short Absorption and optical selection rules of tunable excitons in biased bilayer graphene
title_full Absorption and optical selection rules of tunable excitons in biased bilayer graphene
title_fullStr Absorption and optical selection rules of tunable excitons in biased bilayer graphene
title_full_unstemmed Absorption and optical selection rules of tunable excitons in biased bilayer graphene
title_sort Absorption and optical selection rules of tunable excitons in biased bilayer graphene
author Henriques, J. C. G.
author_facet Henriques, J. C. G.
Epstein, Itai
Peres, N. M. R.
author_role author
author2 Epstein, Itai
Peres, N. M. R.
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Henriques, J. C. G.
Epstein, Itai
Peres, N. M. R.
dc.subject.por.fl_str_mv Ciências Naturais::Ciências Físicas
Science & Technology
topic Ciências Naturais::Ciências Físicas
Science & Technology
description Biased bilayer graphene, with its easily tunable band gap, presents itself as the ideal system to explore the excitonic effect in graphene-based systems. In this paper we study the excitonic optical response of such a system by combining a tight-binding model with the solution of the Bethe-Salpeter equation, the latter being solved in a semianalytical manner, requiring a single numerical quadrature, thus allowing for a transparent calculation. With our approach we start by analytically obtaining the optical selection rules, followed by the computation of the absorption spectrum for the case of a biased bilayer encapsulated in hexagonal boron nitride, a system which has been the subject of a recent experimental study. Excellent agreement is seen when we compare our theoretical prediction with the experimental data.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-01-01T00:00:00Z
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 https://hdl.handle.net/1822/78280
url https://hdl.handle.net/1822/78280
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Henriques, J. C. G., Epstein, I., & Peres, N. M. R. (2022). Absorption and optical selection rules of tunable excitons in biased bilayer graphene. Physical Review B, 105(4), 045411. doi: 10.1103/PhysRevB.105.045411
2469-9950
10.1103/PhysRevB.105.045411
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.045411
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799132220937469952

Registros relacionados