Few layer graphene on SiC, pyrolitic graphite and graphene: a Raman scattering study

Details Few layer graphene on SiC, pyrolitic graphite and graphene: a Raman scattering study Few layer graphene on SiC, pyrolitic graphite and graphene: a Raman scattering study

2007-09-17

arxiv.org/abs/0709.2538v4

Appl. Phys. Lett. 92, 011914, (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 Figures Structure of the paper strongly modified, small changes in Fig 2 and 3. Same interpretation and same result

Scientific paper

10.1063/1.2828975

The results of micro-Raman scattering measurements performed on three different ``graphitic'' materials: micro-structured disks of highly oriented pyrolytic graphite, graphene multi-layers thermally decomposed from carbon terminated surface of 4H-SiC and an exfoliated graphene monolayer are presented. Despite its multi-layer character, most parts of the surface of the graphitized SiC substrates shows a single-component, Lorentzian shape, double resonance Raman feature in striking similarity to the case of a single graphene monolayer. Our observation suggests a very weak electronic coupling between graphitic layers on the SiC surface, which therefore can be considered to be graphene multi-layers with a simple (Dirac-like) band structure.

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