Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
32461 | Nano Today | 2010 | 6 Pages |
Abstract
SummaryWe study heat conduction and diffusion in silicon nanowires (SiNWs) systematically by using non-equilibrium molecular dynamics. It is found that the thermal conductivity (κ) of SiNWs diverges with the length as, κ ∝ Lβ, even when the length is up to 1.1 μm which is much longer than the phonon mean free path. The dependences of β on temperature and length are also discussed. Moreover, an anomalous heat diffusion is observed which is believed to be responsible for the length dependent thermal conductivity. Our results provide strong evidence that Fourier's law of heat conduction is not valid in low-dimensional nanostructures.
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Authors
Nuo Yang, Gang Zhang, Baowen Li,