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Self-heating of metallic carbon nanotube bundles in the regime of the Luttinger-liquid conductivity
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2011 (English)In: Low temperature physics (Woodbury, N.Y., Print), ISSN 1063-777X, E-ISSN 1090-6517, Vol. 37, no 8, 710-717 p.Article in journal (Refereed) Published
Abstract [en]

The conductivity of bundles of carbon single-walled nanotubes with metallic conductivity (metallic nanotubes) is investigated over the wide temperature range 4.2-330 K and electrical fields up to 50 V. The usage of short electrical pulses of the duration of 10 ns allowed to avoid an influence of a self-heating of the investigated structures on current-voltage characteristics. It is shown that the temperature dependence of conductivity is described by the power function G proportional to T(alpha). At helium temperatures the asymptotic dependence of current on applied voltage is close to J proportional to V(1+alpha) with alpha = 0.45. From comparison of the obtained results of measurements with calculations, it is shown that the conductivity of nanotube bundles is well described within the theory of the Luttinger-liquid conductivity for one-dimensional conductors. The self-heating of the carbon nanotube bundles was observed in the case of measurements in the regime of dc current. A method for determination of the self-heating temperature of nanotube bundles as a function of an applied electrical field is proposed. The power dependence of the self-heating temperature on voltage T proportional to V(p) with the exponent p = 2.1 was observed above some threshold voltage in the temperature range 4.2-200 K. Above 200 K the exponent decreased down to p = 1.35. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3662331]

Place, publisher, year, edition, pages
2011. Vol. 37, no 8, 710-717 p.
Keyword [en]
electronic-structure; single wall nanotubes; Luttinger liquid, resistivity
National Category
Physical Sciences
Research subject
Solid State Physics
Identifiers
URN: urn:nbn:se:umu:diva-51496DOI: 10.1063/1.3662331ISI: 000297935800010OAI: oai:DiVA.org:umu-51496DiVA: diva2:481990
Funder
Swedish Research Council, 621-2010-3732
Note

Simultaneous publication in Fizika Nizkikh Temperatur, volume 37, issue 8, pages 892-902 (2011).

Available from: 2013-02-07 Created: 2012-01-23 Last updated: 2017-12-08Bibliographically approved

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Sundqvist, Bertil

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