Phonon backscattering and thermal conductivity suppression in sawtooth nanowires

被引：159

作者：

Moore, Arden L. ^{[2
]}

Saha, Sanjoy K. ^{[1
]}

Prasher, Ravi S. ^{[1
,3
]}

Shi, Li ^{[2
,4
]}

机构：

[1] Intel Corp, Chandler, AZ 85226 USA

[2] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA

[3] Arizona State Univ, Dept Mech & Aerosp Engn, Tempe, AZ 85287 USA

[4] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2970044

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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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页数：3

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