Electrical conductivities of the Ag6PS5X and the Cu6PSe5X (X=Br, I) argyrodites |
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Authors: | R.B. Beeken J.J. Garbe J.M. Gillis N.R. Petersen B.W. Podoll M.R. Stoneman |
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Affiliation: | Department of Physics and Astronomy, University of Wisconsin, Stevens Point, Wisconsin 54481, USA |
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Abstract: | The Ag6PS5Br and Ag6PS5I argyrodites crystallize in a face-centered-cubic lattice at room temperature. Both compounds exhibit purely Arrhenius behavior throughout the temperature range 150-400 K with similar activation energies of about 0.23 eV. Cu6PSe5Br and Cu6PSe5I also crystallize in a face-centered-cubic structure at room temperature. Cu6PSe5Br exhibits a distinctive anomaly in electrical conductivity near 286 K while Cu6PSe5I undergoes a first-order electrical phase transition near 265 K. Their activation energies above room temperature are 0.13 and 0.30 eV, respectively. |
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Keywords: | 66.30.Hs |
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