Curvature effects in the D* band of small diameter carbon nanotubes

Author(s)

Jenö Kürti, Viktor Zólyomi, János Koltai, Ferenc Simon, Rudolf Pfeiffer, Hans Kuzmany

Abstract

The energy dispersion of the D* (G') band shows a strong diameter dependence according to Raman measurements on double walled carbon nanotubes. The Raman shift of the small diameter inner tubes shows an average softening. There is an oscillation around an average linear behavior with slopes of 108 cm(-1)/eV and 61 cm(-1)/eV for the outer and inner tubes, respectively. We show that the experimental observation can be reproduced by simple model calculations if the curvature effects are taken into account. The phonon softening with increasing curvature was proven by first principles calculations

Organisation(s)

Dynamics of Condensed Systems

External organisation(s)

Eötvös Loránd University Budapest, Budapest University of Technology and Economics

Journal

Physica Status Solidi. B: Basic Research

Volume

244

Pages

4261-4264

No. of pages

4

ISSN

0370-1972

DOI

https://doi.org/10.1002/pssb.200776168

Publication date

2007

Peer reviewed

Yes

Austrian Fields of Science 2012

210006 Nanotechnology

Portal url

https://ucrisportal.univie.ac.at/en/publications/fa01a3b8-962d-4465-9080-6e1099fac055