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Electric resistance of single-walled carbon nanotubes under hydrostatic pressure
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
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2001 (English)In: Solid State Communications, ISSN 0038-1098, Vol. 118, no 1, 31-36 p.Article in journal (Refereed) Published
Abstract [en]

The electric resistance of single-walled nanotube mats has been studied systematically under both ambient and high hydrostatic pressures up to 1.5 GPa. Both the temperature dependence of the resistance and the magnetoresistance indicate that electrical transport occurs by variable range hopping, apparently in 2D. We suggest that this unexpected dimensionality arises from a fractal network of tubes and bundles. Under hydrostatic pressure (HP) the resistance still shows 2D variable range hopping and decreases with increasing HP. An irreversible increase in localization length and DOS is induced below 0.5 GPa. The behavior is reversible and due to strong interaction of tubes from 0.5 GPa up to 1.05 GPa. These results indicate that 2D variable range hopping occurs within bundles.

Place, publisher, year, edition, pages
Elsevier B.V. , 2001. Vol. 118, no 1, 31-36 p.
Keyword [en]
Carbon nanotubes, single-walled carbon nanotubes, SWNT, Nanostructures, Electronic transport, resistance, high pressure, Strain, hopping, fractal networks
National Category
Condensed Matter Physics
Research subject
URN: urn:nbn:se:umu:diva-21882DOI: 10.1016/S0038-1098(01)00034-5OAI: diva2:212166
Available from: 2009-04-21 Created: 2009-04-21 Last updated: 2010-01-21

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Sundqvist, BertilAndersson, OveWågberg, Thomas
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