Transport properties of Na8Si46 - art. no. 153201

Authors
Nolas, GS Ward, JM Gryko, J Qiu, L White, MA
Citation
Gs. Nolas et al., Transport properties of Na8Si46 - art. no. 153201, PHYS REV B, 6415(15), 2001, pp. 3201
Citations number
25
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6415
Issue
15
Year of publication
2001
Database
ISI
SICI code
0163-1829(20011015)6415:15<3201:TPON-A>2.0.ZU;2-9
Abstract
We report on transport properties of polycrystalline Na8Si46 in the tempera ture range 10 to 300 K. The compound is a type I clathrate with Na incorpor ated into polyhedra formed by framework Si atoms. Seebeck coefficient and r esistivity measurements indicate metallic behavior, The thermal conductivit y is low in comparison with crystalline Si, but high in comparison with oth er type I clathrates with a large contribution due to electronic conduction . The potential for thermoelectric applications also is discussed.