Graphene bilayer with a twist: Electronic structure

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Lopes M B L dos Santos (Author) FCUP; Peres, NMR (Author) Other; Castro Neto, AH (Author) Other

Journal

Title: Physical Review Letters

Vol. 99

ISSN: 0031-9007

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 940 Citations

Scopus - 1064 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-004-5QG

DOI: 10.1103/physrevlett.99.256802

Abstract (EN): We consider a graphene bilayer with a relative small angle rotation between the layers - a stacking defect often seen in the surface of graphite - and calculate the electronic structure near zero energy in a continuum approximation. Contrary to what happens in an AB stacked bilayer and in accord with observations in epitaxial graphene, we find: (a) the low energy dispersion is linear, as in a single layer, but the Fermi velocity can be significantly smaller than the single-layer value; (b) an external electric field, perpendicular to the layers, does not open an electronic gap.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4