Abstract
Calculations based on the first-principles pseudopotential plane-wave method and densityfunctional theory are performed to investigate the electronic properties of graphene, bilayergraphene, multilayer graphene, and graphite. From an analysis of the electronic bandstructure close to the Fermi level, we have quantified the gradual change in the Fermisurface topology from the point-like structure for graphene to a warped triangular shapefor graphite. We have also discussed the gradual change in the electron and holeeffective masses and velocities as the system evolves from graphene to graphite.
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