Localized states at zigzag edges of bilayer graphene

• Type: Article in International Scientific Journal
• Date: 2008

Authors

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

Journal

Title: Physical Review Letters

Vol. 100

ISSN: 0031-9007

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 138 Citations

Scopus - 139 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4