Electron-phonon coupling and Raman spectroscopy in graphene

  title={Electron-phonon coupling and Raman spectroscopy in graphene},
  author={Antonio H. Castro Neto and Francisco Guinea},
  journal={Physical Review B},
  • A. Neto, F. Guinea
  • Published 24 August 2006
  • Materials Science, Physics
  • Physical Review B
We show that the electron-phonon coupling in graphene, in contrast with the nonrelativistic two-dimensional electron gas, leads to shifts in the phonon frequencies that are nontrivial functions of the electronic density. These shifts can be measured directly in Raman spectroscopy. We show that depending whether the chemical potential is smaller (larger) than half of the phonon frequency, the frequency shift can negative (positive) relative to the neutral case (when the chemical potential is at… 
Raman scattering and tunable electron-phonon coupling in single layer graphene
Abstract Graphene, the two-dimensional hexagonal lattice of carbon atoms, is promising for future electronic devices and for studies of fundamental interactions. New behaviors are linked to the
Measurement and control of electron-phonon interactions in graphene
Despite the weak interaction between electrons and atomic vibrations (phonons) in the one-atom thick crystal of carbon called graphene, the scattering of electrons off phonons limits coherent
Observation of phonon peaks and electron-phonon bound states in graphene
Phonons, the fundamental vibrational modes of a crystal lattice, play a crucial role in determining electronic properties of materials through electron-phonon interaction. However, it has proved
Doping and phonon renormalization in carbon nanotubes.
We show that the Raman frequency associated with the vibrational mode at approximately 1,580 cm(-1) (the G mode) in both metallic and semiconducting carbon nanotubes shifts in response to changes in
Manifestation of LO–LA phonons in Raman scattering in graphene
We analyze the spectral density of Raman scattering in graphene accompanied by the emission of a pair of LO or LA phonons from the corner of the Brillouin zone. Using a minimal tight-binding model
Observation of anomalous phonon softening in bilayer graphene.
The observation in bilayer graphene of an unusual phonon softening that provides the first experimental proof for another type of phonon anomaly is reported, which is a logarithmic singularity in the phonon group velocity.
Electron–phonon scattering and excitonic effects in T-carbon
Through first-principles calculations combining many-body perturbation theory, we investigate electron–phonon scattering and optical properties including the excitonic effects of T-carbon. Our
Many-body effects on out-of-plane phonons in graphene
We study the properties of out-of-plane phonons in the framework of the many-body theory of graphene. We investigate, in particular, the way in which the coupling to electron?hole excitations