Abergel, David S. L. and McCann, Edward and Falko, Vladimir (2007) QHE and far infra-red properties of bilayer graphene in a strong magnetic field. European Physical Journal Special Topics, 148 (1). pp. 105-115. ISSN 1951-6355
Full text not available from this repository.Abstract
We describe the quantum Hall effect (QHE) and far infra-red (FIR) absorption properties of bilayer graphene in a strong magnetic field and contrast them with the weak field regime. This includes a derivation of the effective low energy Hamiltonian for this system and the consequences of this Hamiltonian for the sequencing of the Landau levels in the material: The form of this effective Hamiltonian gives rise to the presence of a level with doubled degeneracy at zero energy. The effect of a potential difference between the layer of a bilayer is also investigated. It is found that there is a density-dependent gap near the K points in the band structure. The consequences of this gap on the QHE are then described. Also, the magneto-absorption spectrum is investigated and an experiment proposed to distinguish between model ground states of the bilayer quantum Hall effect system based on the different absorption characteristics of right-handed and left-handed polarisation of FIR light. Finally, the effects of trigonal warping are taken into account in the absorption picture.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | European Physical Journal Special Topics |
| Subjects: | Q Science > QC Physics |
| Departments: | Faculty of Science and Technology > Physics |
| ID Code: | 11374 |
| Deposited By: | Dr Edward McCann |
| Deposited On: | 14 Aug 2008 09:33 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 17 Aug 2012 16:10 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/11374 |
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