Abstract
We have measured the temperature-dependent thermal conductivity of crystalline ropes of single-walled carbon nanotubes from 350 K to 8 K. decreases smoothly with decreasing temperature, and displays linear temperature dependence below 30 K. Comparison with electrical conductivity experiments indicates that the room-temperature thermal conductivity of a single nanotube may be comparable to that of diamond or in-plane graphite, while the ratio of thermal to electrical conductance for a given sample indicates that the thermal conductivity is dominated by phonons at all temperatures. Below 30 K, the linear temperature dependence and estimated magnitude of imply an energy-independent phonon mean free path of ∼0.5–1.5 μm.
- Received 15 October 1998
DOI:https://doi.org/10.1103/PhysRevB.59.R2514
©1999 American Physical Society