Polarization resolved magneto-Raman scattering of graphene-like domains on natural graphite

Details Polarization resolved magneto-Raman scattering of graphene-like domains on natural graphite Polarization resolved magneto-Raman scattering of graphene-like domains on natural graphite

2012-03-08

arxiv.org/abs/1203.1847v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 11 figures

Scientific paper

The micro-Raman scattering response of a graphene-like location on the surface of bulk natural graphite is investigated both at $T=\unit{4.2}{K}$ and at room temperature in magnetic fields up to 29 T. Two different polarization configurations, co-circular and crossed-circular, are employed in order to determine the Raman scattering selection rules. Several distinct series of electronic excitations are observed and we discuss their characteristic shapes and amplitudes. In particular, we report a clear splitting of the signals associated with the inter-Landau level excitations $-n\rightarrow+n$. Furthermore, we observe the pronounced interaction of the zone-center E$_{\text{2g}}$-phonon with three different sets of electronic excitations. Possible origins for these graphene-like inclusions on the surface of bulk graphite are discussed.

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