Proceedings ArticleDOI
Kohn Anomalies and Electron‐Phonon Coupling in Carbon Nanotubes
S. Piscanec,Andrea C. Ferrari,Michele Lazzeri,Francesco Mauri,John Robertson +4 more
- Vol. 786, Iss: 1, pp 424-427
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TLDR
In this paper, two Kohn anomalies are present in the phonon dispersion of graphene and their slope is proportional to the square of the electron-phonon coupling, and they are enhanced in metallic nanotubes due to their reduced dimensionality.Abstract:
Kohn anomalies are distinct features of the phonon dispersion in metallic systems, associated to the presence of a Fermi surface. Graphene is a model system to understand the physical properties of carbon nanotubes. Two Kohn anomalies are present in the phonon dispersion of graphene and their slope is proportional to the square of the electron‐phonon coupling. Kohn anomalies are enhanced in metallic nanotubes due to their reduced dimensionality and absent for semiconducting. The electron‐phonon coupling for nanotubes of arbitrary chirality and diameter can be obtained from graphite.read more
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Journal ArticleDOI
Optical phonons in carbon nanotubes: Kohn anomalies, Peierls distortions, and dynamic effects
TL;DR: In this article, the vibrational properties of single wall carbon nanotubes (SWNTs) were studied and the effect of curvature and confinement on the phonon dispersions was analyzed.
References
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Journal ArticleDOI
Quantum theory of solids
Rudolf Peierls,Louis D. Roberts +1 more
TL;DR: In this article, the interaction of light with non-conducting crystals has been studied in the context of crystal lattices and its applications in general theory and applications, such as semi-conductivity and superconductivity.
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