Magneto-Raman scattering of graphene on graphite: Electronic and phonon excitations

Details Magneto-Raman scattering of graphene on graphite: Electronic and phonon excitations Magneto-Raman scattering of graphene on graphite: Electronic and phonon excitations

2011-01-10

arxiv.org/abs/1101.1756v2

Phys. Rev. Lett. 107, 036807, (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures; revised manuscript with additional data

Scientific paper

Magneto-Raman scattering experiments from the surface of graphite reveal novel features associated to purely electronic excitations which are observed in addition to phonon-mediated resonances. Graphene-like and graphite domains are identified through experiments with $\sim 1\mu m$ spatial resolution performed in magnetic fields up to 32T. Polarization resolved measurements emphasize the characteristic selection rules for electronic transitions in graphene. Graphene on graphite displays the unexpected hybridization between optical phonon and symmetric across the Dirac point inter Landau level transitions. The results open new experimental possibilities - to use light scattering methods in studies of graphene under quantum Hall effect conditions.

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