Article ID Journal Published Year Pages File Type
1547174 Physica E: Low-dimensional Systems and Nanostructures 2008 6 Pages PDF
Abstract

The ππ bands of epitaxially grown graphene are studied by using high resolution angle resolved photoemission spectroscopy. Clear deviations from the conical dispersion expected for massless Dirac fermions and an anomalous increase of the scattering rate are observed in the vicinity of the Dirac point energy. Possible explanations for such anomalies are discussed in terms of many-body interactions and the opening of a gap. We present detailed experimental evidences in support of the gap scenario. This finding reveals a fundamental intrinsic property of epitaxial graphene and demonstrates the possibility of engineering the band gap in epitaxial graphene.

Related Topics
Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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