“School of Physic”

Back to Papers Home
Back to Papers of School of Physic

Paper   IPM / Physic / 11178
School of Physics
  Title:   Effect of Holstein Phonons on the Optical Conductivity of Gapped Graphene
1.  kh. Jahanbani
2.  R. Asgari
  Status:   Published
  Journal: Eur. Phys. J. B
  Vol.:  73
  Year:  2010
  Pages:   247-252
  Supported by:  IPM
We study the optical conductivity of a doped graphene when a symmetry breaking of the sublattices is occurred in the presence of electron-phonon interaction. Our study is based on the Kuba formula that is established upon the retarded self-energy. We report new features of both the real and imaginary parts of the quasiparticle self-energy in the presence of a gap opening. We find an analytical expression for the renormalized Fermi velocity of massive Dirac Fermions over broad ranges of electron densities, gap values and the electron-phonon coupling constant. Finally we conclude that the inclusion of the renormalized Fermi energy and the band gap effects is indeed crucial to get reasonable feature for the optical conductivity.

Download TeX format
back to top
scroll left or right