ARPES study of the electronic dynamics from graphene to graphite

We report unique electronic information about the low energy electronic dynamics of atomically-thin graphene and bulk graphite by using high-resolution angle-resolved photoemission spectroscopy (ARPES). I will discuss the evolution of the electronic structure from single layer graphene to graphite and the dynamic of the Dirac quasiparticles as a function of energy, momentum, temperature and sample thickness.~ I will also discuss some very interesting features near the Fermi energy E$_{F}$ and address the effects of disorder on the low energy excitations. These findings from the electronic side can provide insight on the intriguing physics in graphene and graphite, as well as other carbon-based materials. References: [1] S. Y. Zhou \textit{et al.} Nature Phys. \textbf{2}, 595 (2006) [2] S. Y. Zhou \textit{et al.} Annals of Physics \textbf{321}, 1730 (2006) [3] E. Rollings, G.-H. Gweon, S.Y. Zhou \textit{et al}. J. Phys. Chem. Solids \textbf{67}, 2172 (2006) [4] S. Y. Zhou \textit{et al.} Phys. Rev. B \textbf{71}, 161403(R) (2005)