Localized states at zigzag edges of bilayer graphene

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Eduardo V Castro (Autor) FCUP; Peres, NMR (Autor) Outra; Lopes dos Santos, JMBL (Autor) FCUP; Castro Neto, AH (Autor) Outra; Guinea, F (Autor) Outra

Revista

Título: Physical Review Letters

Vol. 100

ISSN: 0031-9007

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 138 Citações

Scopus - 139 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-004-20V

DOI: 10.1103/physrevlett.100.026802

Abstract (EN): We report the existence of zero-energy surface states localized at zigzag edges of bilayer graphene. Working within the tight-binding approximation we derive the analytic solution for the wave functions of these peculiar surface states. It is shown that zero-energy edge states in bilayer graphene can be divided into two families: (i) states living only on a single plane, equivalent to surface states in monolayer graphene and (ii) states with a finite amplitude over the two layers, with an enhanced penetration into the bulk. The bulk and surface (edge) electronic structure of bilayer graphene nanoribbons is also studied, both in the absence and in the presence of a bias voltage between planes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4