Cortijo Fernandez, Alberto and Oroszlany, Laszlo and Schomerus, Henning (2010) Fast and slow edges in bilayer graphene nanoribbons:tuning the transition from band to Mott insulator. Physical Review B, 81 (23). ISSN 1550-235X
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Official URL: http://dx.doi.org/10.1103/PhysRevB.81.235422
Abstract
We show that gated bilayer graphene zigzag ribbons possess a fast and a slow edge, characterized by edge-state velocities that differ due to non-negligible next-nearest-neighbor hopping elements. By applying bosonization and renormalization group methods, we find that the slow edge can acquire a sizable interaction-induced gap, which is tunable via an external gate voltage Vg. In contrast to the gate-induced gap in the bulk, the interaction-induced gap depends nonmonotonously on the on-site potential V.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Physical Review B |
| Additional Information: | © 2010 The American Physical Society |
| Subjects: | UNSPECIFIED |
| Departments: | Faculty of Science and Technology > Physics |
| ID Code: | 51667 |
| Deposited By: | ep_importer_pure |
| Deposited On: | 30 Nov 2011 09:47 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 19:55 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/51667 |
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