P. Kossacki, C. Faugeras, M. Kühne, M. Orlita, A. Mahmood, E. Dujardin, R. R. Nair, A. K. Geim, M. Potemski
Polarization resolved, Raman scattering response due to E$_{2g}$ phonon in monolayer graphene has been investigated in magnetic fields up to 29 T. The hybridization of the E$_{2g}$ phonon with only the fundamental inter Landau level excitation (involving the n=0 Landau level) is observed and only in one of the two configurations of the circularly crossed polarized excitation and scattered light. This polarization anisotropy of the magneto-phonon resonance is shown to be inherent to relatively strongly doped graphene samples, with carrier concentration typical for graphene deposited on SiO$_2$.
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http://arxiv.org/abs/1207.6943
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