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Effect of Disorder on Several Properties of the One-Band Hubbard Model in 2D

  • J. A. Vergés
  • F. Guinea
  • J. Galán
  • G. Chiappe
  • E. Louis
Chapter
  • 381 Downloads
Part of the NATO ASI Series book series (NSSB, volume 343)

Abstract

In this work, we continue the study of the Hubbard model with infinite U that has been reported previously [1, 2]. Ground state quantum numbers, momentum distribution, magnetic structure factor, overlap of the exact wavefunction with the Gutzwiller wavefunction and, several electronic correlations have been obtained for a 4 × 4 cluster of the square lattice. In particular, the possible existence of a phase transition from a perturbative region where the overlap between the non-interacting Fermi sea and the correlated wavefunction is large to a non perturbative region where this overlap is negligible, has been carefully examined. Although non conclusive due to the size limitations, we have shown that the momentum distribution for a small density of holes closely resembles that of spinless fermions.

Keywords

Momentum Distribution Hubbard Model Total Spin Double Occupancy Spinless Fermion 
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]
    G. Chiappe, E. Louis, J. Galán, F. Guinea, and J. A. Vergés. Phys. Rev B 46, 3506, 1992.ADSCrossRefGoogle Scholar
  2. [2]
    G. Chiappe, E. Louis, J. Galán, F. Guinea, and J. A. Vergés. Phys. Rev B 48, 16539, 1993.ADSCrossRefGoogle Scholar
  3. [3]
    E. Louis, G. Chiappe, J. Galán, F. Guinea, and J. A. Vergés. Phys. Rev. B 48, 426, 1993.ADSCrossRefGoogle Scholar
  4. [4]
    A. Montorsi. The Hubbard Model: A reprint volume. World Scientific, Singapore, 1992.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • J. A. Vergés
    • 1
  • F. Guinea
    • 1
  • J. Galán
    • 1
  • G. Chiappe
    • 2
  • E. Louis
    • 2
  1. 1.Instituto de Ciencia de Materiales, Consejo Superior de Investigaciones CientíficasUniversidad AutónomaMadridSpain
  2. 2.Departamento de Física AplicadaUniversidad de AlicanteAlicanteSpain

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