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Occupation Potential Versus Coulomb Correlation Energy in 4-f Insulators

  • F. López-Aguillar
  • J. Costa-Quintana
  • J. S. Muñoz

Abstract

Hufner and Werteim’s estimate the correlation energy between 4fn and 4fn+l configurations by photoemission experiments to be of the order of 6 eV while others give a value of ~10.5 eV. We have established a method based on the energy differences per unit cell with two configurations as a Coulomb correlation, from the band structure and an estimation of the collective effects by perturbative methods which by introducing the U correlation in the MT potential allows us to find the excited states showing some hybridation and deslocalization and a widening of 4f bands. This broadening could explain the discrepancy observed in the above experimental results.

Keywords

Band Structure Energy Difference Physical Review Correlation Energy Collective Effect 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J.F. Herbst, R.E. Watson and J.W. Wilkins, Physical Review B, 17, 3089 (1978).ADSCrossRefGoogle Scholar
  2. 2.
    J.F. Herbst, Physical Review B, 21, 427 (1980).ADSCrossRefGoogle Scholar
  3. 3.
    P.O. Hedén, H. Löfgren and S.B.M. Hagström, Physical Review Letters, 26, 432 (1971).ADSCrossRefGoogle Scholar
  4. 4.
    P.O. Hedén, H. Löfgren and S.B.M. Hagström, Physica Status Solidi B, 49, 721 (1972).ADSCrossRefGoogle Scholar
  5. 5.
    S. Hüfner and G.K. Wertheim, Physical Review B, 7, 5086 (1973).ADSCrossRefGoogle Scholar
  6. 6.
    B. Fatlogg, E. Kaidis, A. Schegel and P. Wachter, Physical Review B, 12, 3940 (1975).ADSCrossRefGoogle Scholar
  7. 7.
    J.K. Lang, Y. Baer and P.A. Cox, Physical Review Letters, 42, 74 (1979).ADSCrossRefGoogle Scholar
  8. 8.
    J. Costa-Quintana and F. Lôpez Aguilar (to be published).Google Scholar
  9. 9.
    ω is twice the energy difference between empty and filled bands.Google Scholar

Copyright information

© Springer Science+Business Media New York 1981

Authors and Affiliations

  • F. López-Aguillar
    • 1
  • J. Costa-Quintana
    • 1
  • J. S. Muñoz
    • 1
  1. 1.Departamento de Electricidad y ElectrónicaUniversidad Autónoma de BarcelonaBellaterra - BarcelonaSpain

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