We investigate the effect of asymmetry in bilayer graphene induced by a diatomic substrate (such as SiC) and its influence on the bilayer spectrum in zero and strong magnetic fields. We also determine selection rules for inter-Landau level transitions, taking into account all four πbands.
Mucha-Kruczynski, M., Abergel, D. S. L., McCann, E., & Fal'ko, V. I. (2009). On spectral properties of bilayer graphene: The effect of an SiC substrate and infrared magneto-spectroscopy. Journal of Physics-Condensed Matter, 21(34), . https://doi.org/10.1088/0953-8984/21/34/344206