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

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    • 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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      Posted on July 25, 2019

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