Electron-phonon coupling mechanism in two-dimensional graphite and single-wall carbon nanotubes

Ge G. Samsonidze, E. B. Barros, R. Saito, J. Jiang, G. Dresselhaus, M. S. Dresselhaus

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)

Abstract

The electron-phonon coupling in two-dimensional graphite and metallic single-wall carbon nanotubes is analyzed. The highest-frequency phonon mode at the K point in two-dimensional graphite opens a dynamical band gap that induces a Kohn anomaly. Similar effects take place in metallic single-wall carbon nanotubes that undergo Peierls transitions driven by the highest-frequency phonon modes at the Γ and K points. The dynamical band gap induces a nonlinear dependence of the phonon frequencies on the doping level and gives rise to strong anharmonic effects in two-dimensional graphite and metallic single-wall carbon nanotubes.

Original languageEnglish
Article number155420
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number15
DOIs
Publication statusPublished - 2007 Apr 19

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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