THERMAL TRANSPORT IN FEW-QUINTUPLE BI2TE3 THIN FILMS AND NANORIBBONS

被引：0

作者：

Qiu, Bo ^{[1
]}

Ruan, Xiulin ^{[1
]}

机构：

[1] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA

来源：

PROCEEDINGS OF THE ASME/JSME 8TH THERMAL ENGINEERING JOINT CONFERENCE 2011, VOL 3 | 2011年

关键词：

THERMOELECTRIC PROPERTIES; CONDUCTIVITY; TEMPERATURE; PERFORMANCE;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this work, thermal conductivity of perfect and nanoporous few-quintuple Bi2Te3 thin films as well as nanoribbons with perfect and zig-zag edges is investigated using molecular dynamics (MD) simulations with Green-Kubo method. We find minimum thermal conductivity of perfect Bi2Te3 thin films with three quintuple layers (QLs) at room temperature, and we believe it originates from the interplay between inter-quintuple coupling and phonon boundary scattering. Nanoporous films and nanoribbons are studied for additional phonon scattering channels in suppressing thermal conductivity. With 5% porosity in Bi2Te3 thin films, the thermal conductivity is found to decrease by a factor of 4-6, depending on temperature, comparing to perfect single QL For nanoribbons, width and edge shape are found to strongly affect the temperature dependence as well as values of thermal conductivity.

引用

页码：593 / 597

页数：5

共 26 条

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