Spectro-microscopy of single and multi-layer graphene supported by a weakly interacting substrate

Details Spectro-microscopy of single and multi-layer graphene supported by a weakly interacting substrate Spectro-microscopy of single and multi-layer graphene supported by a weakly interacting substrate

2008-06-02

arxiv.org/abs/0806.0355v1

Physics

Condensed Matter

Materials Science

10 pages of text, 4 JPEG figures

Scientific paper

10.1103/PhysRevB.78.201408

We report measurements of the electronic structure and surface morphology of exfoliated graphene on an insulating substrate using angle-resolved photoemission and low energy electron diffraction. Our results show that although exfoliated graphene is microscopically corrugated, the valence band retains a massless fermionic dispersion, with a Fermi velocity of ~10^6 m/s. We observe a close relationship between the morphology and electronic structure, which suggests that controlling the interaction between graphene and the supporting substrate is essential for graphene device applications.

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