The quasiparticle spectral function in doped graphene
Mesoscale and Nanoscale Physics
2008-05-12 v2 Disordered Systems and Neural Networks
Abstract
We calculate the real and imaginary 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. Our theory provides the basis for calculating {\it all} one-electron properties of extrinsic graphene. Comparison with existing ARPES measurements shows broad qualitative agreement between theory and experiment. We also calculate the renormalized graphene momentum distribution function, finding a typical Fermi liquid discontinuity at k_F. We also provide a critical discussion of the relevant many body approximations (e.g. RPA) for graphene.
Cite
@article{arxiv.0708.1133,
title = {The quasiparticle spectral function in doped graphene},
author = {E. H. Hwang and S. Das Sarma},
journal= {arXiv preprint arXiv:0708.1133},
year = {2008}
}
Comments
5 pages, 3 figures