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Paper   IPM / Physic / 8706
School of Physics
  Title:   Effect of Disorder on the Ground-State Properties of Graphene
  Author(s): 
1.  R. Asgari
2.  M. M. Vazifeh
3.  M. R. Ramezanali
4.  E. Davoudi
5.  B. Tanatar
  Status:   Published
  Journal: Phys. Rev. B
  Vol.:  77
  Year:  2008
  Pages:   125432
  Supported by:  IPM
  Abstract:
We calculate the ground-state energy of Dirac electrons in graphene in the presence of disorder. We take randomly distributed charged impurities at a fixed distance from the graphene sheet and surface fluctuations (ripples) as the main scattering mechanisms. Mode-coupling approach to scattering rate and random-phase approximation for ground-state energy incorporating the many-body interactions and the disorder effects yields good agreement with experimental inverse compressibility.

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