Valley Symmetry Breaking in Bilayer Graphene: A Test of the Minimal Model

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Nakamura, M (Author) Other; Eduardo V Castro (Author) Other; Dora, B (Author) Other

Journal

Title: Physical Review Letters

Vol. 103

ISSN: 0031-9007

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 41 Citations

Scopus - 30 Citations

Other information

Authenticus ID: P-003-DHS

DOI: 10.1103/physrevlett.103.266804

Abstract (EN): Physical properties reflecting the valley asymmetry of Landau levels in a biased bilayer graphene under a magnetic field are discussed. Within the 4-band continuum model with a Hartree-corrected self-consistent gap and finite damping factor we predict the appearance of anomalous steps in quantized Hall conductivity due to the degeneracy lifting of Landau levels. Moreover, the valley symmetry breaking effect appears as a nonsemiclassical de Haas-van Alphen effect where the reduction of the oscillation period to half cannot be accounted for through quasiclassical quantization of the orbits in reciprocal space.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4