Abstract
The electronic phase transition in cerium occurring near 7 kbar pressure at room temperature which is attributed to the 4f–5d electron promotion has been studied using thermoelectric power as a tool. The important results that have emerged out of this work are: (a) the relatively large variation in the absolute thermoelectric power ofγ-cerium (normal fcc phase) with pressure prior to the phase transition (in contrast to the rather small resistivity change with pressure in this region); (b) a sharp decrease in the thermoelectric power accompanying the iso-structuralγ-α phase transition; and (c) the continuous decrease in the thermoelectric power ofα-cerium (collapsed fcc phase) with pressure, ultimately changing sign at higher pressures. An explanation based on the “virtual bound state” model is proposed to account for these results.
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Ramesh, T.G., Reshamwala, A.S. & Ramaseshan, S. Thermoelectric power of cerium at high pressures. Pramana - J. Phys. 2, 171–178 (1974). https://doi.org/10.1007/BF02847791
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DOI: https://doi.org/10.1007/BF02847791