TITLE

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

AUTHOR(S)
Avila, M. A.; Suekuni, K.; Umeo, K.; Fukuoka, H.; Yamanaka, S.; Takabatake, T.
PUB. DATE
January 2008
SOURCE
Applied Physics Letters;1/28/2008, Vol. 92 Issue 4, p041901
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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 (β-BGS), showing one of the lowest recorded thermal conductivities κ(T) for any bulk compound, while still behaving electronically as a heavily doped n-type semiconducting crystal.
ACCESSION #
29401185

 

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