Quasiparticle spectral function in doped graphene: Electron-electron interaction effects in ARPES

We calculate the electron self-energy as well as the quasiparticle spectral function in doped graphene, taking into account electron-electron interaction in the leading order dynamically screened Coulomb coupling and electron-impurity interaction associated with quenched disorder. Our theory provides the basis for calculating all one-electron properties of extrinsic graphene. Comparison with existing angle-resolved photoemission spectroscopy measurements shows broad qualitative and semiquantitative agreement between theory and experiment, for both the momentum-distribution and energy-distribution curves in the measured spectra.