Gaped graphene bilayer: disorder and magnetic field effects

Details Gaped graphene bilayer: disorder and magnetic field effects Gaped graphene bilayer: disorder and magnetic field effects

2007-11-21

arxiv.org/abs/0711.3479v1

phys. stat. sol. (b) 244, 2311 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1002/pssb.200674604

Double layer graphene is a gapless semiconductor which develops a finite gap when the layers are placed at different electrostatic potentials. We study, within the tight-biding approximation, the electronic properties of the gaped graphene bilayer in the presence of disorder, perpendicular magnetic field, and transverse electric field. We show that the gap is rather stable in the presence of diagonal disorder. We compute the cyclotron effective mass in the semi-classical approximation, valid at low magnetic fields. Landau level formation is clearly seen in zigzag and armchair ribbons of the gaped bilayer at intermediate magnetic fields.

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