Phonon Density of States of Single-Wall Carbon Nanotubes

S. Rols; Z. Benes; E. Anglaret; J. L. Sauvajol; P. Papanek; J. E. Fischer; G. Coddens; H. Schober; A. J. Dianoux

doi:10.1103/PhysRevLett.85.5222

Phonon Density of States of Single-Wall Carbon Nanotubes

S. Rols, Z. Benes, E. Anglaret, J. L. Sauvajol, P. Papanek, J. E. Fischer, G. Coddens, H. Schober, and A. J. Dianoux

Phys. Rev. Lett. 85, 5222 – Published 11 December 2000

Abstract

The vibrational density of states of single-wall carbon nanotubes (SWNT) was obtained from inelastic neutron scattering data from 0 to 225 meV. The spectrum is similar to that of graphite above 40 meV, while intratube features are clearly observed at 22 and 36 meV. An unusual energy dependence below 10 meV is assigned to contributions from intertube modes in the 2D triangular lattice of SWNT bundles, and from intertube coupling to intratube excitations. Good agreement between experiment and a calculated density of states for the SWNT lattice is found over the entire energy range.

Received 1 March 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.5222

Authors & Affiliations

S. Rols^1,2, Z. Benes³, E. Anglaret¹, J. L. Sauvajol¹, P. Papanek^3,4, J. E. Fischer³, G. Coddens⁵, H. Schober², and A. J. Dianoux²

¹Groupe de Dynamique des Phases Condensées (UMR CNRS 5581), Université Montpellier II, 34095 Montpellier Cedex 5, France
²Institut Laue-Langevin, 38042 Grenoble Cedex, France
³Department of Materials Science and Engineering and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104
⁴Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
⁵Laboratoire Léon Brillouin (CEA/CNRS), CE Saclay, 91191 Gif-sur-Yvette Cedex, France