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Experimental and theoretical studies of plasma resonance and the electronic structure of binary skutterudites

Published online by Cambridge University Press:  01 February 2011

Øystein Prytz ,
Ole M. Løvvik  and
Johan Taftø
Øystein Prytz
Affiliation:
oystein.prytz@smn.uio.no, University of Oslo, Centre for Materials Science and Nanotechnology, P.O.Box 1126-Blindern, OSLO, N/A, NO-0316, Norway, +47 22 84 06 84, +47 22 84 06 51
Ole M. Løvvik
Affiliation:
o.m.lovvik@fys.uio.no, University of Oslo, Centre for Materials Science and Nanotechnology, Norway
Johan Taftø
Affiliation:
johan.tafto@fys.uio.no, University of Oslo, Centre for Materials Science and Nanotechnology, Norway
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Abstract

We determine the plasmon energies of the skutterudites CoP3, CoAs3 and CoSb3 by electron energy loss spectroscopy, and compare with calculated values from the Drude model and density functional theory (DFT). For these compounds, whose doped versions have potential applications as thermoelectric materials, there is a relatively large discrepancy between experiment and theory based on the Drude model as well as the DFT-calculations. We also study the transitions from occupied to unoccupied states near the Fermi-level that show up at energies lower than the plasmon energies. The features observed are in general agreement with the DFT-calculations.

Keywords

electron energy loss spectroscopy (EELS)transmission electron microscopy (TEM)thermoelectricity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 886: Symposium F – Materials and Technologies fore Direct Thermal-to-Electric Energy Conversion , 2005 , 0886-F09-11
Copyright
Copyright © Materials Research Society 2006

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References

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