Ba8 Ga16 Sn30 with type-I clathrate structure: Drastic suppression of heat conduction

M. A. Avila, K. Suekuni, K. Umeo, H. Fukuoka, S. Yamanaka, T. Takabatake

Research output: Contribution to journalArticle

89 Citations (Scopus)

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 Ba8 Ga16 Sn30 single crystals grown in the type-I clathrate structure (ß-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.

Original languageEnglish
Article number041901
JournalApplied Physics Letters
Volume92
Issue number4
DOIs
Publication statusPublished - Feb 8 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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