Breit-Wigner-Fano lineshapes in Raman spectra of graphene

Abstract

Excitation of electron-hole pairs in the vicinity of the Dirac cone by the Coulomb interaction gives rise to an asymmetric Breit-Wigner-Fano lineshape in the phonon Raman spectra in graphene. This asymmetric lineshape appears due to the interference effect between the phonon spectra and the electron-hole pair excitation spectra. The calculated Breit-Wigner-Fano asymmetric factor 1/qBWF as a function of the Fermi energy shows a V-shaped curve with a minimum value at the charge neutrality point and gives good agreement with the experimental result.

15 pages, 4 figures

References in corpus (5)

• Electric Field Effect in Atomically Thin Carbon Films
• Dielectric function, screening, and plasmons in 2D graphene
• Excitonic Effects on the Optical Response of Graphene and Bilayer Graphene
• Phonon Linewidths and Electron Phonon Coupling in Nanotubes
• Probing the Electronic Structure of Bilayer Graphene by Raman Scattering

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