The specific heat and the radial thermal expansion of bundles of single-walled carbon nanotubes

M. I. Bagatskii, M. S. Barabashko, A. V. Dolbin, V. V. Sumarokov, B. Sundqvist

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The specific heat at constant pressure C(T) of bundles of single-walled carbon nanotubes (SWNTs) closed at their ends has been investigated in the temperature interval of 2-120 K. It is found that the curve C(T) has features near 5, 36, 80, and 100 K. The experimental results on the C(T) and the radial thermal expansion coefficient αR(T) of bundles of SWNTs oriented perpendicular to the sample axis have been compared. It is found that the curves C(T) and αR(T) exhibit a similar temperature behavior at T > 10 K. The temperature dependence of the Grüneisen coefficient γ(T) has been calculated. The curve γ(T) also has a feature near 36 K. Above 36 K the Grüneisen coefficient is practically independent of temperature (γ ≈ 4). Below 36 K, γ(T) decreases monotonically with lowering temperature and becomes negative at T < 6 K.

Original languageEnglish
Pages (from-to)523-528
Number of pages6
JournalLow Temperature Physics
Volume38
Issue number6
DOIs
Publication statusPublished - 22 Jun 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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