Abstract
Carbon composes lots of material, like diamond and graphite. But the biggest difference is that graphite is a conductor while diamond is an insulator, because of the bonding. The carbon atoms in the diamond hybridize into the three-dimension sp3 covalent bonding, however the carbon atoms hybridize into two-dimension sp2 covalent bonding in-plane and the delocalized pz bonding results in metallic bonding which forms the π band. The interaction between layer and layer is the weak van der Waals' force so that graphite is a conductor. Graphite has been researched for decades. M. S. Dresselhaus和G. Dresselhaus used the tight-binding theory to describe the band structure of graphite in 1981 and A. Grüneis used the TB-GW to describe the band structure of graphite. In my thesis I will discuss the electronic structure of graphite measured by ARPES. Unlike graphene, graphite is a three-dimension material the different position along z ̂ direction, the different the band structure of graphite will be. To graphite, the two valence π bands with the different incident photon energy which respect to different position along z ̂ direction, results in the periodically merge or split of two valence π bands. In addition I will use the tight-bind theory to describe the Fermi surface result from two valence π bands. The major goal is obtain a set of tight-binding parameters that could well-described Fermi surface at high binding energy, moreover using the same parameters to describe the Fermi surface at low binding energy. Then discuss the describing at low binding energy.