ABSTRACT
The electronic structure is a fundamental physical characteristic
of graphene, and knowledge of this structure is necessary in
order to understand the physics of graphene and to investi-
gate its technological applications. Because graphene has a two-
dimensional honeycomb lattice structure, its electronic structure,
energy dispersion, and density of states can be calculated easily
using the tight-binding (TB) model or the first-principles method.
In this chapter, we present the results of electronic structure
calculations for (i) single-and bilayer graphene sheets; (ii) graphene
nanoribbons (GNRs) and those with hydrogen or vacancies; (iii)
metal/graphene contacts, including metal/graphene/metal junc-
tions; and (iv) graphene sheets with ripples.
