Quantum effects in the radial thermal expansion of bundles of single-walled carbon nanotubes doped with 4He

Details Quantum effects in the radial thermal expansion of bundles of single-walled carbon nanotubes doped with 4He Quantum effects in the radial thermal expansion of bundles of single-walled carbon nanotubes doped with 4He

2010-04-07

arxiv.org/abs/1004.1079v1

Fiz. Nizk. Temp., v. 36, No. 7, p. 797-799 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 figure, will be published in Fiz.Nizk Temp. #7, 2010

Scientific paper

The radial thermal expansion (ar) of bundles of single-walled carbon nanotubes saturated with 4He impurities to the molar concentration 9.4% has been investigated in the interval 2.5-9.5 K using the dilatometric method. In the interval 2.1-3.7 K (ar) is negative and is several times higher than the negative (ar) for pure nanotube bundles. This most likely points to 4He atom tunneling between different positions in the nanotube bundle system. The excess expansion was reduced with decreasing 4He concentration.

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