Electromagnetic response and pseudo-zero-mode Landau levels of bilayer graphene in a magnetic field
arXiv:0803.2452 · doi:10.1103/PhysRevB.77.195423
Abstract
The electromagnetic response of bilayer graphene in a magnetic field is studied in comparison with that of monolayer graphene. Both types of graphene turn out to be qualitatively quite similar in dielectric and screening characteristics, especially those deriving from vacuum fluctuations, but the effect is generally much more sizable for bilayers. The presence of the zero-(energy-)mode Landau levels is a feature specific to graphene. In bilayers, unlike in monolayers, the effect of the zero-mode levels becomes visible and even dominant in density response as an externally-controllable band gap develops. It is pointed out that the splitting of nearly-degenerate pseudo-zero-mode levels at each valley, specific to bilayer graphene, is controlled by an applied inplane electric field or by an injected current. In addition, a low-energy effective gauge theory of bilayer graphene is constructed.
arXiv comment9 pages, 4 figures, revtex; corrected typos, to appear in PRB
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Cited by in corpus (17)
- Properties of Graphene: A Theoretical Perspective
- Electronic properties of a biased graphene bilayer
- Many-body corrections to cyclotron resonance in monolayer and bilayer graphene
- Pseudo-zero-mode Landau levels and collective excitations in bilayer graphene
- Quantum Hall ferromagnetic phases in the Landau level N=0 of a graphene bilayer
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- Influence of interlayer asymmetry on magneto-spectroscopy of bilayer graphene
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