Partially coherent phonon transport in two-dimensionally rough nanowires

被引：7

作者：

Sadhu, Jyothi ^{[1
]}

Seong, Myunghoon ^{[1
]}

Sinha, Sanjiv ^{[1
]}

机构：

[1] Univ Illinois, Dept Mech Sci & Engn, Urbana, IL 61801 USA

来源：

JOURNAL OF COMPUTATIONAL ELECTRONICS | 2012年 / 11卷 / 01期

基金：

美国国家科学基金会;

关键词：

Phonon transport; Multiple scattering; Rough nanowire; Thermal conductivity; CONDUCTION; SCATTERING; HEAT;

D O I：

10.1007/s10825-012-0382-2

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Rough surface nanowires exhibit a severely reduced thermal conductivity compared to the bulk. Their thermal conductivities are much below the value predicted from the diffuse scattering model. Such low thermal conductivities are particularly promising for thermoelectric applications. We extend our previous work on understanding this phenomenon using a model of partially coherent phonon transport. Considering both azimuthal and longitudinal roughness, we show that it is the latter that dominates thermal conductivity reduction. Our work advanced fundamental phonon boundary scattering that is key in applications ranging from semiconductor devices to thermoelectric materials.

引用

页码：1 / 7

页数：7