Optical Properties of MFe4P12 filled skutterudites
S. V. Dordevic, N. R. Dilley, E. D. Bauer, D. N. Basov, M. B. Maple, L. Degiorgi
Abstract
Infrared reflectance spectroscopy measurements were made on four members of the MFe4P12 family of filled skutterudites, with M=La, Th, Ce and U. In progressing from M=La to U the system undergoes a metal-insulator transition. It is shown that, although the filling atom induces such dramatic changes in the transport properties of the system, it has only a small effect on lattice dynamics. We discuss this property of the compounds in the context of their possible thermoelectric applications.
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