期刊
APPLIED PHYSICS LETTERS
卷 93, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.2970044
关键词
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资金
- MURI [N00014-07-1-0723]
- National Science Foundation Thermal Transport Processes Program
- Office of Naval Research
The effect of surface roughness on phonon transport in a nanowire has often been described by treating the surface as flat with a specularity parameter (p) in the range between 0 and 1. A lower thermal conductivity limit is approached at p=0 for diffuse surface. It is demonstrated here by Monte Carlo simulation that sawtooth roughness on a nanowire can cause phonon backscattering and suppress the thermal conductivity below the diffuse surface limit. The backscattering effect can be accounted for only by a negative p if the detail of the surface roughness is ignored. (c) 2008 American Institute of Physics.
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