Ground State Wave Function of an Extended Hubbard Model

  • T. Nishino
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 70)


Energy level structure of an extended Hubbard model, which contains an additional spin flip term, is investigated. At half filling the system is insulating, where the ground state is easily obtained. When a hole is introduced, a bound state appears in the middle of the Hubbard gap.


  1. 1.
    J. Kanamori: Prog. Theor. Phys 30 275 (1963).CrossRefzbMATHADSGoogle Scholar
  2. 2.
    J. Hubbard: Proc. Roy. Soc A281 401 (1964).ADSGoogle Scholar
  3. 3.
    A. Montorsi and M. Rasetti: Phys. Rev. Lett 66 1383 (1991).CrossRefzbMATHADSMathSciNetGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • T. Nishino
    • 1
  1. 1.Department of Physics, Faculty of ScienceOsaka UniversityToyonaka, Osaka 560Japan

Personalised recommendations