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http://hdl.handle.net/1843/50170| Type: | Artigo de Periódico |
| Title: | Twisted bilayer graphene photoluminescence emission peaks at van Hove singularities |
| Authors: | Thonimar Vieira de Alencar Souza Driele Von Dreifus Maria Gabriela Cota Moreira Eliel Gomes da Silva Neto Chao-Hui Yeh Po-Wen Chiu Marcos Assunção Pimenta Leandro Malard Moreira Ana Maria de Paula |
| Abstract: | We 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. |
| Subject: | Grafeno Fotoluminescência |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1088/1361-648X/aab64b |
| URI: | http://hdl.handle.net/1843/50170 |
| Issue Date: | 3-Apr-2018 |
| metadata.dc.url.externa: | https://iopscience.iop.org/article/10.1088/1361-648X/aab64b |
| Appears in Collections: | Artigo de Periódico |
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