Twisted bilayer graphene photoluminescence emission peaks at van Hove singularities.

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dc.contributor.authorSouza, Thonimar Vieira de Alencar
dc.contributor.authorDreifus, Driele Von
dc.contributor.authorMoreira, Maria Gabriela Cota
dc.contributor.authorSilva Neto, Eliel Gomes da
dc.contributor.authorYeh, Chao-Hui
dc.contributor.authorChiu, Po-Wen
dc.contributor.authorPimenta, Marcos Assunção
dc.contributor.authorMoreira, Leandro Malard
dc.contributor.authorPaula, Ana Maria de
dc.date.accessioned2018-10-29T17:05:24Z
dc.date.available2018-10-29T17:05:24Z
dc.date.issued2018
dc.description.abstractWe report on photoluminescence emission imaging by femtosecond laser excitation on twisted bilayer graphene samples. The emission images are obtained by tuning the excitation laser energies in the near infrared region. We demonstrate an increase of the photoluminescence emission at excitation energies that depends on the bilayer twist angle. The results show a peak for the light emission when the excitation is in resonance with transitions at the van Hove singularities in the electronic density of states. We measured the photoluminescence excitation peak position and width for samples with various twist angles showing resonances in the energy range of 1.2 to 1.7 eV.pt_BR
dc.identifier.citationSOUZA, T. V. de A. et al. Twisted bilayer graphene photoluminescence emission peaks at van Hove singularities. Journal of Physics: Condensed Matter, v. 30, n. 17, p. 175302, abr. 2018. Disponível em: <http://iopscience.iop.org/article/10.1088/1361-648X/aab64b>. Acesso em: 16 jun. 2018.pt_BR
dc.identifier.issn1361648X
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/10479
dc.identifier.uri2http://iopscience.iop.org/article/10.1088/1361-648X/aab64bpt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectLuminescencept_BR
dc.subjectFemtosecond excitationpt_BR
dc.titleTwisted bilayer graphene photoluminescence emission peaks at van Hove singularities.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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