Field Effects on Optical Phonons in Bilayer Graphene

Tsuneya Ando, Mikito Koshino

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)


Effects of electron-phonon interaction on the optical-phonon spectrum are studied within the lowest order perturbation in a bilayer graphene with potential difference associated with applied electric field. Due to the asymmetry of two layers, symmetric and antisymmetric modes are strongly mixed with each other and two peaks appear in Raman spectra. This behavior can also be controlled by a field due to an extra top gate. When the external field is sufficiently strong and opens up a gap comparable to the phonon energy, the phonons are modified considerably by resonant interband transitions.

Original languageEnglish
Article number034709
Journaljournal of the physical society of japan
Issue number3
Publication statusPublished - 2009 Mar


  • Bilayer
  • Broadening
  • Electron-phonon interaction
  • Graphene
  • Optical phonon
  • Two-dimensional graphite

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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