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Journal of Superconductivity and Novel Magnetism

, Volume 23, Issue 6, pp 1173–1175 | Cite as

Long-Range Correlation Energies, Off-diagonal Interactions and Correlation Hamiltonian for π Electronic Systems

  • Hua Zhao
Original Paper

Abstract

A general formula of the long-range correlation energy E c for the π electron systems is given, which includes diagonal interactions and off-diagonal interactions and we put forward to a correlation Hamiltonian at the first time. It is found that the effects of the off-diagonal interactions W and X on the correlation energies are opposite. The effect of W is to increase the correlation energies, but the effect of X is being counteracted by the integral term J due to |X|∼|J|. The long-range correlation energies decrease with increasing the screening effect. At normal screening, the influence of W on the correlation energies can be neglected.

Long-range correlation energies Off-diagonal interactions Correlation Hamiltonian π electronic systems 

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References

  1. 1.
    Zhao, H.: Eur. Phys. J. B 54, 11 (2006) CrossRefADSGoogle Scholar
  2. 2.
    Rohling, M., Louie, S.G.: Phys. Rev. Lett. 82, 1959 (1999) CrossRefADSGoogle Scholar
  3. 3.
    Sun, X., Shuai, Z., Naxu, K., Lin, D.L., George, T.F.: Phys. Rev. B 44, 11042 (1991) CrossRefADSGoogle Scholar
  4. 4.
    Zhao, H., Fu, R.-T., Sun, X., Zhang, Z.-L.: Phys. Rev. B 56, 12268 (1997) CrossRefADSGoogle Scholar
  5. 5.
    Hirsch, J.E., Marsiglio, F.: Phys. Rev. B 39, 11515 (1989) CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Department of Physics and Institute for Condensed Matter PhysicsChongQing UniversityChongQingP.R. China

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