• Interatomic and intra-atomic electron correlation in narrow band solids

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      https://www.ias.ac.in/article/fulltext/pram/001/05/0212-0229

    • Keywords

       

      Narrow band solids; pseudoparticle density of states; interatomic electron correlation; intra-atomic electron correlation

    • Abstract

       

      Effect of interatomic electron correlation has been studied in narrow band solids using one-particle Green function method. We follow Hubbard in drawing an analogy with an alloy and find a self-consistent solution which predicts a finite lifetime for pseudoparticles. A specific case of a (non-magnetic) model system with half-filled parabolic band has been considered to calculate the pseudoparticle density of states function. Unlike the result in the presence of intra-atomic correlations alone, we find that this particular system is never an insulator, however large intra-atomic correlations may be.

    • Author Affiliations

       

      I S Tyagi1 S K Joshi1

      1. Department of Physics, University of Roorkee, Roorkee - 247667
    • Dates

       
  • Pramana – Journal of Physics | News

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