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Optical phonons of graphene and nanotubes

Abstract : We review the optical phonon dispersions of graphene. In particular, we focus on the presence of two Kohn anomalies in the highest optical phonon branch at the Γ and K points of the Brillouin zone. We then show how graphene can be used as a model for the calculation of phonons in carbon nanotubes. Finally, we present the beyond Born-Oppenheimer corrections to their phonon dispersions. These are experimentally revealed in the Raman spectra of doped samples.
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Submitted on : Wednesday, March 9, 2022 - 4:43:41 PM
Last modification on : Friday, March 11, 2022 - 3:31:51 AM

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S. Piscanec, M. Lazzeri, F. Mauri, A. C. Ferrari. Optical phonons of graphene and nanotubes. The European Physical Journal Special Topics, 2007, 148, pp.159-170. ⟨10.1140/epjst/e2007-00236-2⟩. ⟨insu-03603180⟩

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