An Essential Mechanism of Heat Dissipation in Carbon Nanotube Electronics
Abstract
Excess heat generated in integrated circuits is one of the major problems of modern electronics. Surface phonon-polariton scattering is shown here to be the dominant mechanism for hot charge carrier energy dissipation in a nanotube device fabricated on a polar substrate, such as $SiO_2$. Using microscopic quantum models the Joule losses were calculated for the various energy dissipation channels as a function of the electric field, doping, and temperature. The polariton mechanism must be taken into account to obtain an accurate estimate of the effective thermal coupling of the non-suspended nanotube to the substrate, which was found to be 0.1-0.2 W/m.K even in the absence of the bare phononic thermal coupling.
- Publication:
-
Nano Letters
- Pub Date:
- May 2009
- DOI:
- 10.1021/nl803835z
- arXiv:
- arXiv:0903.1358
- Bibcode:
- 2009NanoL...9.1850R
- Keywords:
-
- Condensed Matter - Materials Science
- E-Print:
- Nano Letters vol. 9 (5), 1850-1855 (March 31, 2009).