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Violation of Fourier's law and anomalous heat diffusion in silicon nanowires

Paper ID Volume ID Publish Year Pages File Format Full-Text
32461 44931 2010 6 PDF Available
Title
Violation of Fourier's law and anomalous heat diffusion in silicon nanowires
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.

Keywords
Nanowires; Low-dimensional system; Heat conduction; Heat diffusion
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Violation of Fourier's law and anomalous heat diffusion in silicon nanowires
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Publisher
Database: Elsevier - ScienceDirect
Journal: - Volume 5, Issue 2, April 2010, Pages 85–90
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us