Transmission function and thermal conductivity of Si phononic crystals

被引：0
|
作者：
Oh, Jung Hyun [1 ]
Jang, Moon-Gyu [2 ]
Moon, S. E. [3 ]
Shin, Mincheol [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Elect Engn, Daejeon 305701, South Korea
[2] Hallym Univ, Dept Mat Sci & Engn, Chunchon 200702, South Korea
[3] Elect & Telecommun Res Inst, Daejeon 305350, South Korea
来源：
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING | 2016年 / 24卷 / 07期
基金：
新加坡国家研究基金会;
关键词：
phononic thermal conductivity; phononic crystal; Green function; phonon transport; EFFICIENT THERMOELECTRIC-MATERIAL; SILICON NANOWIRES; SUPERLATTICES; CONDUCTANCE; TRANSPORT;
D O I：
10.1088/0965-0393/24/7/075010
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate phonon transport properties of Si phononic crystals by using an atomistic Green function method. By varying form factors such as thickness, orientation, and pore size of unit cells, mean-free path and associated thermal conductivity of phononic crystals are obtained. We present the empirical formula for thermal conductivity as a function of cell size and, by extrapolating results from it for realistic cell sizes, the thermal conductivity is compared with experimental ones. The formula is found to predict a nearly equal amount of the suppression in thermal conductivity to the experimental values, implying a feasible calculation method for predicting thermal properties of phononic crystals.
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页数：15
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