期刊
PHYSICAL REVIEW B
卷 78, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.201408
关键词
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资金
- DOE [DE-FG02-04-ER-46157]
- NSF [CHE-0641523]
- NYSTAR
- MIUR-PRIN2006 [2006020543_002]
- National Basic Research Program of China [2007CB925001]
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 similar to 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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