Communications in Theoretical Physics ›› 2012, Vol. 57 ›› Issue (03): 482-484.

• Condensed Matter: Electronic Structure, Electrical, Magnetic, and Optical Properties • Previous Articles     Next Articles

Optical Conductivity of Graphene Sheet Including Electron-Phonon Interaction

Hamze Mousavi   

  1. Department of Physics, Razi University, Kermanshah, Iran Nano Science and Nano Technology Research Center, Razi University, Kermanshah, Iran
  • Received: 2011-09-15 Revised: 2011-11-02 Published: 2012-03-15

Abstract: Using an expression of optical conductivity, based on the linear response theory, the Green's function technique and within the Holstein Hamiltonian model, the effect of electron-phonon interaction on the optical conductivity of graphene plane is studied. It is found that the electron-phonon coupling increases the optical conductivity of graphene sheet in the low frequency region due to decreasing quasiparticle weight of electron excitation while the optical conductivity reduces in the high frequency region. The latter is due to role of electrical field's frequency.

Key words: graphene, optical conductivity, Holstein model, electron-phonon interaction, Green’s function

PACS numbers: 

  • 73.22.-f