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Paper   IPM / Physic / 8981
School of Physics
  Title:   Effect of Gap Opening on the Quasiparticle Properties of Doped Graphene Sheets
1.  A. Qaiumzadeh
2.  F. K. Joibari
3.  R. Asgari
  Status:   Published
  Journal: Eur. Phys. J. B
  Vol.:  74
  Year:  2010
  Pages:   479-485
  Supported by:  IPM
We present numerical calculations of the impact of charge carriers-carriers interactions on the dynamical properties of quasiparticles such as renormalized velocity and quasiparticle inelastic scat- tering lifetime in a gapped graphene sheet. Our formalism is based on the many-body G0W- approximation for the self-energy. We present results for the many-body renormalized velocity suppression and the renormalization constant over a broad range of energy gap values. We �nd that the renormalized velocity is almost independence of the carrier densities at large density regime. We also show that the quasiparticle inelastic scattering lifetime decreases by increasing the gap value. Finally, we present results for the mean free path of charge carriers suppression over the energy gap values.

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