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Low-Temperature Transport Properties of Sn24P19.3Br8 and Sn17Zn7P22Br8
Authors:S. Stefanoski  L. N. Reshetova  A. V. Shevelkov  G. S. Nolas
Affiliation:(1) Department of Physics, University of South Florida, Tampa, USA;(2) Department of Chemistry, Inorganic Synthesis Laboratory, Moscow State University, 119992 Moscow, Russia
Abstract:
We report on temperature-dependent thermal conductivity, resistivity, and Seebeck coefficient of two polycrystalline Br-containing Sn-clathrate compounds with the type I crystal structure. Interstitial Br atoms reside inside the polyhedral cavities formed by the framework, resulting in hole conduction. The framework bonding directly influences the transport properties of these two compositions. The transport properties of these two clathrates are compared with those of other Sn-clathrates. We also discuss our results in terms of the potential for thermoelectric applications.
Keywords:Clathrate  thermal conductivity  electrical conductivity  Seebeck coefficient
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