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Abstract: Magneto Raman scattering study of the E$ {2g}$ optical phonons in multi-layerepitaxial graphene grown on a carbon face of SiC are presented. At 4.2K inmagnetic field up to 33 T, we observe a series of well pronounced avoidedcrossings each time the optically active inter Landau level transition is tunedin resonance with the E$ {2g}$ phonon excitation at 196 meV. The width of thephonon Raman scattering response also shows pronounced variations and isenhanced in conditions of resonance. The experimental results are wellreproduced by a model that gives directly the strength of the electron-phononinteraction.



Autor: C. Faugeras, M. Amado, P. Kossacki, M. Orlita, M. Sprinkle, C. Berger, W.A. de Heer, M. Potemski

Fuente: https://arxiv.org/







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