Low-frequency Magneto-optical Spectra of Bilayer Bernal Graphene

Details Low-frequency Magneto-optical Spectra of Bilayer Bernal Graphene Low-frequency Magneto-optical Spectra of Bilayer Bernal Graphene

2009-08-06

arxiv.org/abs/0908.0771v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages and 3 figures

Scientific paper

The low-frequency magneto-optical absorption spectra of bilayer Bernal graphene are studied within the tight-binding model and gradient approximation. The interlayer interactions strongly affect the electronic properties of the Landau levels (LL's), and thus enrich the optical absorption spectra. According to the characteristics of the wave functions, the low-energy LL's can be divided into two groups. This division results in four kinds of optical absorption peaks with complex optical selection rules. Observing the experimental convergent absorption frequencies close to zero magnetic field might be useful and reliable in determining the values of several hopping integrals. The dependence of the optical absorption spectra on the field strength is investigated in detail, and the results differ considerably from those of monolayer graphene.

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