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1/f noise and mechanisms of the conductivity in carbon nanotube bundles
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2011 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 49, no 15, 5201-5206 p.Article in journal (Refereed) Published
Abstract [en]

Experimental results are reported of the investigation of conductivity mechanisms in metallic single-wall carbon nanotube (SWCNT) bundles in a wide temperature range from 4.2 K to 300 K. The temperature dependence of the resistance and noise parameters – the logarithmic slope of the current dependence of noise as well as the normalized current noise – are compared. Remarkable changes in noise characteristics are registered at temperatures typical of the transition from hopping conductivity to Luttinger liquid conductivity and the transition from Luttinger liquid conductivity to diffusion conductivity. In the first transition region, the slope of the normalized noise level of the current changes significantly as a function of temperature. In the region of diffusion conductivity, a stronger variation of the normalized noise level is revealed. These changes in noise properties are correlated with changes in the transport characteristics of SWCNT bundles that allow us to adequately explain the mechanisms of conductivity in the system. 

Place, publisher, year, edition, pages
Elsevier Ltd , 2011. Vol. 49, no 15, 5201-5206 p.
Keyword [en]
single wall carbon nanotubes, bundles, 1/f noise, conductivity, low temperture
National Category
Condensed Matter Physics
Research subject
URN: urn:nbn:se:umu:diva-47702DOI: 10.1016/j.carbon.2011.07.037OAI: diva2:443960
Swedish Research Council, 621-2010-3732
Available from: 2011-09-27 Created: 2011-09-27 Last updated: 2014-02-25Bibliographically approved

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Sundqvist, Bertil
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