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http://hdl.handle.net/1843/80375| Tipo: | Artigo de Periódico |
| Título: | Landau level splittings, phase transitions, and nonuniform charge distribution in trilayer graphene |
| Autor(es): | Leonardo Cristiano Campos Thiti Taychatanapat Maksym Serbyn Kawin Surakitbovorn Kenji Watanabe Takashi Taniguchi Dmitry A. Abanin Pablo Jarillo-Herrero |
| Resumen: | We report on magneto-transport studies of dual-gated, Bernal-stacked trilayer graphene (TLG) encapsulated in boron nitride crystals. We observe a quantum Hall effect staircase which indicates a complete lifting of the twelve-fold degeneracy of the zeroth Landau level. As a function of perpendicular electric field, our data exhibits a sequence of phase transitions between all integer quantum Hall states in the filling factor interval −8 < ν < 0. We develop a theoretical model and argue that, in contrast to monolayer and bilayer graphene, the observed Landau level splittings and quantum Hall phase transitions can be understood within a single-particle picture, but imply the presence of a charge density imbalance between the inner and outer layers of TLG, even at charge neutrality and zero transverse electric field. Our results indicate the importance of a previously unaccounted band structure parameter which, together with a more accurate estimate of the other tight-binding parameters, results in a significantly improved determination of the electronic and Landau level structure of TLG. |
| Asunto: | Efeito quântico de Hall Estrutura eletrônica Fenômenos mesoscópicos |
| Idioma: | eng |
| País: | Brasil |
| Editor: | Universidade Federal de Minas Gerais |
| Sigla da Institución: | UFMG |
| Departamento: | ICX - DEPARTAMENTO DE FÍSICA |
| Tipo de acceso: | Acesso Restrito |
| Identificador DOI: | https://doi.org/10.1103/PhysRevLett.117.066601 |
| URI: | http://hdl.handle.net/1843/80375 |
| Fecha del documento: | 2016 |
| metadata.dc.url.externa: | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.066601 |
| metadata.dc.relation.ispartof: | Physical Review Letters |
| Aparece en las colecciones: | Artigo de Periódico |
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