Chiu, H.-Y. and Deshpande, V. V. and Postma, H. W. Ch. and Lau, C. N. and Mikó, C. and Forró, L. and Bockrath, M. (2005) Ballistic Phonon Thermal Transport in Multiwalled Carbon Nanotubes. Physical Review Letters, 95 (22). Art. no. 226101. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:CHIprl05
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We report electrical transport experiments, using the phenomenon of electrical breakdown to perform thermometry, that probe the thermal properties of individual multiwalled carbon nanotubes. Our results show that nanotubes can readily conduct heat by ballistic phonon propagation. We determine the thermal conductance quantum, the ultimate limit to thermal conductance for a single phonon channel, and find good agreement with theoretical calculations. Moreover, our results suggest a breakdown mechanism of thermally activated C-C bond breaking coupled with the electrical stress of carrying ~10^12 A/m^2. We also demonstrate a current-driven self-heating technique to improve the conductance of nanotube devices dramatically.
|Additional Information:||©2005 The American Physical Society (Received 6 July 2005; published 21 November 2005) We thank Ali Ghaffari for assistance with fabrication. This work was supported by the Office of Naval Research, and Arrowhead Research Corporation (M. B.). The work in Lausanne was supported by the Swiss NSF and its research pool Nanoscale Science (L. F.). C. N. L. acknowledges the support of DARPA/DMEA (H94003-05-2-0504).|
|Subject Keywords:||carbon nanotubes; nanotube devices; ballistic transport; electric breakdown; phonons; thermal conductivity|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Archive Administrator|
|Deposited On:||11 Jan 2006|
|Last Modified:||26 Dec 2012 08:43|
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