First Direct Observation of a Nearly Ideal Graphene Band Structure

Abstract

Angle-resolved photoemission and x-ray diffraction experiments show that multilayer epitaxial graphene grown on the SiC(0001) surface is a new form of carbon that is composed of effectively isolated graphene sheets. The unique rotational stacking of these films causes adjacent graphene layers to electronically decouple leading to a set of nearly independent linearly dispersing bands (Dirac cones) at the graphene K point. Each cone corresponds to an individual macroscale graphene sheet in a multilayer stack where AB-stacked sheets can be considered as low density faults.

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Affiliated Institutions

• University of California, Berkeley US
• Centre National de la Recherche Scientifique FR
• Institut Jean Lamour FR
• Université Paris Cité FR
• Georgia Institute of Technology US
• University of California, Davis US
• Lawrence Berkeley National Laboratory US
• DSM (Netherlands) NL
• Université Paris-Sud FR
• Synchrotron soleil FR
• Institut Néel FR

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