Title
Low-temperature specific heat of nanotube systemsLow-temperature specific heat of nanotube systems
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Department of Physics - other
Publication type
article
Publication
Lancaster, Pa,
Subject
Physics
Source (journal)
Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015
Volume/pages
66(2002):15, p. 1-4
ISSN
1098-0121
1550-235X
1098-0121
Article Reference
153408
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The low-temperature specific heat of single-walled carbon nanotubes (isolated and bundled) and multiwalled carbon nanotubes is calculated within force-constant dynamical models. It is shown that, due to the quadratic dependence of the frequency omega of the transverse-acoustic phonons on the wave number q, the phonon density of states has a singularity of the type 1/rootomega and the very low-temperature specific heat varies as rootT with the temperature T. With the increase of the diameter of the system, the contributions of the longitudinal- and torsional-acoustic phonons to the specific heat begin to prevail and the latter becomes linear in T. These results are confirmed by the recent experimental data.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/eb0d42/5918.pdf
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