Transport properties of polycrystalline type-I Sn clathrates

G. S. Nolas, Joshua Cohn, J. S. Dyck, C. Uher, J. Yang

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Thermal conductivity, resistivity, Seebeck coefficient, and Hall measurements on polycrystalline Sn-clathrate compounds with the type-I hydrate crystal structure are reported. Interstitial alkali-metal atoms in these compounds reside inside polyhedral cavities formed by the tetrahedrally bonded Sn network atoms. Localized disorder associated with "rattling" motion of these interstitial atoms contributes to the low thermal conductivity of these semiconducting compounds. The Hall coefficient and resistivity for some compounds exhibit nonmonotonic temperature dependences consistent with a crossover with decreasing temperature from conduction-band to impurity-band conduction. The carrier mobility is found to be low even in the absence of interstitial atoms within the Sn framework, suggesting a large effective mass and/or scattering rate. We discuss the properties in the context of potential thermoelectric applications.

Original languageEnglish (US)
Article number165201
Pages (from-to)1652011-1652016
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number16
StatePublished - Apr 15 2002

Fingerprint

clathrates
Transport properties
transport properties
Atoms
interstitials
Conduction bands
atoms
Thermal conductivity
conduction bands
thermal conductivity
Alkali Metals
electrical resistivity
Seebeck coefficient
Carrier mobility
Alkali metals
Seebeck effect
carrier mobility
Hydrates
hydrates
alkali metals

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Nolas, G. S., Cohn, J., Dyck, J. S., Uher, C., & Yang, J. (2002). Transport properties of polycrystalline type-I Sn clathrates. Physical Review B - Condensed Matter and Materials Physics, 65(16), 1652011-1652016. [165201].

Transport properties of polycrystalline type-I Sn clathrates. / Nolas, G. S.; Cohn, Joshua; Dyck, J. S.; Uher, C.; Yang, J.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 16, 165201, 15.04.2002, p. 1652011-1652016.

Research output: Contribution to journalArticle

Nolas, GS, Cohn, J, Dyck, JS, Uher, C & Yang, J 2002, 'Transport properties of polycrystalline type-I Sn clathrates', Physical Review B - Condensed Matter and Materials Physics, vol. 65, no. 16, 165201, pp. 1652011-1652016.
Nolas, G. S. ; Cohn, Joshua ; Dyck, J. S. ; Uher, C. ; Yang, J. / Transport properties of polycrystalline type-I Sn clathrates. In: Physical Review B - Condensed Matter and Materials Physics. 2002 ; Vol. 65, No. 16. pp. 1652011-1652016.
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