期刊
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
卷 239, 期 1, 页码 26-34出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.200303236
关键词
-
We have studied the vibrational properties of some of the compounds based on the Type II silicon, germanium, and tin-based clathrate materials using LDA electronic structure methods. The lattices in these framework materials have open cages which can contain weakly bound guest impurities, and these guests produce local (rattling) vibrational modes. Such modes may scatter the extended, heat carrying acoustic vibrational modes of the framework, potentially reducing the thermal conductivity. We present results for the vibrational spectra of the Type II clathrate compounds Na16Cs8Si136, Na16Cs8Ge136, and Cs24Sn136. We discuss trends in the vibrational spectra of the framework host material and of the localized, rattling frequencies of the guest modes as the host changes from Si to Ge to Sn. (C) 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据