Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1855008 | Annals of Physics | 2010 | 8 Pages |
Generation mechanism of energy gaps between conductance and valence bands is at the centre of the study of graphene material. Recently, Chamon, Jackiw et al. proposed a mechanism of using a Kekulé distortion background field φ and its induced gauge potential AiAi to generate energy gaps. In this paper, various vortex structures inhering in this model are studied. Regarding φ as a generic background field rather than a fixed Nielson–Oleson type distribution, we have found two new types of vortices on the graphene surface—the velocity field vortices and the monopole-motion induced vortices—from the inner structure of the potential AiAi. These vortex structures naturally arise from the motion of the Dirac fermions instead of from the background distortion field.