Quantum phenomena in the radial thermal expansion of bundles of single-walled carbon nanotubes doped with 3He. A giant isotope effect

Simultaneous publication in Fizika Nizkikh Temperatur (Kharkov) volume 37, issue 6, pages 685-687 (2011).
The radial thermal expansion αr of bundles of single-walled carbon nanotubes saturated with 3He up to the molar concentration 9.4% has been investigated in the temperature interval 2.1–9.5 K by high-sensitivity capacitance dilatometry. In the interval 2.1–7 K a negative αr was observed, with a magnitude which exceeded the largest negative αr values of pure and 4He-saturated nanotubes by three and two orders of magnitude, respectively. The contributions of the two He isotope impurities to the negative thermal expansion of the nanotube bundles are most likely connected with the spatial redistribution of 4He and 3He atoms by tunneling at the surface and inside nanotube bundles. The isotope effect turned out to be huge, probably owing to the higher tunneling probability of 3He atoms.

Esel'son, V.B. (author)
Gavrilko, V.G. (author)
Manzhelii, Vadim G. (author)
Vinnikov, N.A. (author)
Popov, S.N. (author)
Sundqvist, BertilUmeå universitet,Institutionen för fysik(Swepub:umu)besu0001 (author)
Umeå universitetInstitutionen för fysik (creator_code:org_t)

In:Low temperature physics (Woodbury, N.Y., Print): American Institute of Physics (AIP)37:6, s. 544-5461063-777X1090-6517

By the author/editor: Dolbin, Alexande ...; Esel'son, V.B.; Gavrilko, V.G.; Manzhelii, Vadim ...; Vinnikov, N.A.; Popov, S.N.; show more...; Sundqvist, Berti ...; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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