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      https://www.ias.ac.in/article/fulltext/pram/004/01/0045-0052

    • Keywords

       

      Energy bands; rare earth metals; cerium; density of states; KKR method; spin susceptibility

    • Abstract

       

      The electronic band structure of f.c.c. phase of the rare earth metal cerium (α-cerium) has been calculated using a formulation of the crystal potential where correlation also has been included in addition to exchange. We use the prescription of Cohn and Sham as well as that of Overhauser. The Green’s function method of Korringa-Kohn and Rostoker has been used for obvious advantages in the calculation. The calculations indicate that the s—d bands are hybridized with the f-levels but the f-bands are fairly narrow and lie slightly above the Fermi level. The structure of the bands is qualitatively similar to those of calculations by others except for a general shift of the entire set of bands by about 0·1 Ryd. The density of states has been calculated from the bands obtained. The spin susceptibility ofα-cerium has also been calculated using the Kohn-Sham method. However, the calculated additional contributions to the band structure values cannot still explain the large experimental values reported in the literature.

    • Author Affiliations

       

      R S Rao1 C K Majumdar2 B S Shastry2 R P Singh1

      1. Tata Institute of Fundamental Research, Bombay - 400005
      2. Department of Physics, Indian Institute of Technology, Bombay - 400 076
    • Dates

       
  • Pramana – Journal of Physics | News

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