Random gap model for graphene and graphene bilayers
| dc.creator | Ziegler, K. | |
| dc.date | 2008-11-24 | |
| dc.date.accessioned | 2026-07-07T12:55:19Z | |
| dc.date.available | 2026-07-07T12:55:19Z | |
| dc.description | The effect of a randomly fluctuating gap, created by a random staggered potential, is studied in a monolayer and a bilayer of graphene. The density of states, the one-particle scattering rate and transport properties (diffusion coefficient and conductivity) are calculated at the neutrality point. All these quantities vanish at a critical value of the average staggered potential, signaling a continuous transition to an insulating behavior. The calculations are based on the self-consistent Born approximation for the one-particle scattering rate and a massless mode of the two-particle Green's function which is created by spontaneous symmetry breaking. Transport quantities are directly linked to the one-particle scattering rate. Moreover, the effect of disorder is very weak in the case of a monolayer but much stronger in bilayer graphene. | |
| dc.description | 5 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/0811.3932 | |
| dc.identifier | http://arxiv.org/abs/0811.3932 | |
| dc.identifier | Phys. Rev. Lett. 102, 126802 (2009) | |
| dc.identifier | doi:10.1103/PhysRevLett.102.126802 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/224215 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Random gap model for graphene and graphene bilayers | |
| dc.type | text |