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      https://www.ias.ac.in/article/fulltext/pram/002/04/0171-0178

    • Keywords

       

      Thermoelectric power; cerium; high pressure

    • 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.

    • Author Affiliations

       

      T G Ramesh1 A S Reshamwala1 S Ramaseshan1

      1. Materials Science Division, National Aeronautical Laboratory, Bangalore - 560017
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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