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Pramana

, 4:45 | Cite as

Effect of correlation on the band structure of cerium

  • R S Rao
  • C K Majumdar
  • B S Shastry
  • R P Singh
Solids

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.

Keywords

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

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Copyright information

© the Indian Academy of Sciences 1975

Authors and Affiliations

  • R S Rao
    • 1
  • C K Majumdar
    • 2
  • B S Shastry
    • 2
  • R P Singh
    • 1
  1. 1.Tata Institute of Fundamental ResearchBombay
  2. 2.Department of PhysicsIndian Institute of TechnologyBombay

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