Transmission across a bilayer graphene region

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Olyaei, HZ (Autor) Outra; Ribeiro, P (Autor) Outra; Eduardo V Castro (Autor) FCUP

Revista

Título: Physical Review B

Vol. 99

ISSN: 2469-9950

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 5 Citações

Outras Informações

ID Authenticus: P-00Q-MX7

DOI: 10.1103/physrevb.99.205436

Abstract (EN): The transmission across a graphene bilayer region is calculated for two different types of connections to monolayer leads. A transfer-matrix algorithm based on a tight-binding model is developed to obtain the ballistic transmission beyond linear response. The two configurations are found to behave similarly when no gate voltage is applied. For a finite gate voltage, both develop a conductance gap characteristic of a biased bilayer, but only one shows a pronounced conductance step at the gap edge. A gate voltage domain wall applied to the bilayer region renders the conductance of the two configurations similar For a microstructure consisting of equally spaced domain walls, we find a high sensitivity to the domain size. This is attributed to the presence of topologically protected in-gap states localized at domain walls, which hybridize as the domain size becomes of the order of their confining scale. Our results show that transmission through a bilayer region can be manipulated by a gate voltage in ways not previously anticipated.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9