Eur. Phys. J. Special Topics 148, 5-13 (2007)
https://doi.org/10.1140/epjst/e2007-00220-x

Band structure and many body effects in graphene

¹ Advanced Light Source, E.O. Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
² Department of Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
³ Department of Physics, Montana State University, PO Box 173840, Bozeman, MT, 59717-3840, USA
⁴ Institut für Physik der Kondensierten Materie, Lehrstuhl für Technische Physik, Universität Erlangen-Nürnberg, Erwin-Rommel-Straß e 1, 91058 Erlangen, Germany

Corresponding author: erotenberg@lbl.gov

Abstract

We have determined the electronic bandstructure of clean and potassium-doped single layer graphene, and fitted the graphene π bands to a one- and three-near-neighbor tight binding model. We characterized the quasiparticle dynamics using angle resolved photoemission spectroscopy. The dynamics reflect the interaction between holes and collective excitations, namely plasmons, phonons, and electron-hole pairs. Taking the topology of the bands around the Dirac energy for n-doped graphene into account, we compute the contribution to the scattering lifetimes due to electron-plasmon and electron phonon coupling.