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arXiv · 0708.1133

The quasiparticle spectral function in doped graphene

E. H. Hwang·S. Das Sarma
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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.

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E. H. Hwang, S. Das Sarma. 2007-08-09. The quasiparticle spectral function in doped graphene. https://doi.org/10.1103/physrevb.77.081412

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