Graphene to graphite: electronic changes within DFT calculations

AUTOR(ES)

AlZahrani, A.Z., Srivastava, G.P.

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2009-12

RESUMO

Calculations based on the first-principles pseudopotential plane-wave method and density-functional theory are performed to investigate the electronic properties of graphene, bilayer graphene, multilayer graphene, and graphite. From an analysis of the electronic band structure close to the Fermi level, we have quantified the gradual change in the Fermi surface topology from the point-like structure for graphene to a warped triangular shape for graphite. We have also discussed the gradual change in the electron and hole effective masses and velocities as the system evolves from graphene to graphite.

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