Ba8Ga16Sn30 with type-I clathrate structure:: Drastic suppression of heat conduction

被引：93

作者：

Avila, M. A. ^{[1
]}

Suekuni, K. ^{[1
]}

Umeo, K. ^{[2
]}

Fukuoka, H. ^{[3
]}

Yamanaka, S. ^{[3
]}

Takabatake, T. ^{[1
,4
]}

机构：

[1] Hiroshima Univ, Dept Quantum Matter, ADSM, Higashihiroshima 7398530, Japan

[2] Hiroshima Univ, Cryogen & Instrumental Anal Div, N BARD, Higashihiroshima 7398526, Japan

[3] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan

[4] Hiroshima Univ, Inst Adv Mat Res, Higashihiroshima 7398530, Japan

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 04期

关键词：

D O I：

10.1063/1.2831926

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

For the past decade, intermetallic clathrates have been rattling their way into mainstream research in thermoelectrics. The unusual vibrations of their guest ions inside oversized cages interfere with the cage phonons while leaving the electronic flow intact, providing an exotic way to achieve a best-of-both-worlds scenario in terms of electrical and thermal transport in the same material. Here, we present the structural and thermoelectric properties of Ba8Ga16Sn30 single crystals grown in the type-I clathrate structure (beta-BGS), showing one of the lowest recorded thermal conductivities kappa(T) for any bulk compound, while still behaving electronically as a heavily doped n-type semiconducting crystal. (c) 2008 American Institute of Physics.

引用

页数：3

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