Journal
PHYSICAL REVIEW B
Volume 85, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.245421
Keywords
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Funding
- Region Alsace
- CNRS
- Agence Nationale de la Recherche [ANR-2010-BLAN-1017-ChimiGraphN]
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Gold intercalation between a buffer layer and a graphene monolayer of epitaxial graphene on SiC(0001) leads to the formation of small aggregates of clusters. Angle-resolved photoemission spectroscopy measurements reveal that these clusters preserve the linear dispersion of the graphene quasiparticles and surprisingly increase their Fermi velocity. They also strongly modify the band structure of graphene around the van Hove singularities by a strong extension without charge transfer. These results give new insight on the role of the intercalant in the renormalization of the bare electronic band structure of graphene usually observed in graphite and graphene intercalation compounds.
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