Molecular-dynamics simulation of lattice thermal conductivity in Pb1-xSnxTe and Pb1-xGexTe at high temperature

被引：11

作者：

Chonan, T. ^{[1
]}

Katayama, S. ^{[1
]}

机构：

[1] Japan Adv Inst Sci & Technol, Sch Mat Sci, Nomi, Ishikawa 9231292, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷 / 06期

关键词：

lattice thermal conductivity; molecular-dynamics simulation; PbTe-based alloys;

D O I：

10.1143/JPSJ.75.064601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Molecular-dynamics studies on lattice thermal conductivity (kappa(L)) of Pb1-xSnxTe and Pb1-xGexTe are carried out by employing ion model potential for mutual ion-ion interactions at the average temperatures 300 and 500 K under non-equilibrium condition. Special emphasis of investigation is placed on the alloying effects of kappa(L) calculated by changing the alloy content x in PbTe-based alloys. It has been shown that a remarkable reduction of kappa(L) at finite x is demonstrated in Pb1-xSnxTe and Pb1-xGexTe without relying on a phonon scattering description. We have compared our results with ones evaluated by the Abeles' formula of lattice thermal conductivity due to phonon scattering from alloy fluctuations.

引用

页数：8

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