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Theoretical and Mathematical Physics

, Volume 145, Issue 2, pp 1576–1589 | Cite as

Dynamical Spin Susceptibility in the t-J Model: The Memory Function Method

  • A. A. Vladimirov
  • D. Ihle
  • N. M. Plakida
Article

Abstract

Based on the method of the equations of motion for the relaxation function in terms of Hubbard operators, we evaluate the dynamical spin susceptibility for the t-J model in the paramagnetic phase. Using a Mori-type projection technique, we express the relaxation function in terms of the second-order memory function, which is evaluated in the approximation of coupled modes for hole excitations and spin fluctuations in the fourth order in the hopping parameter t and the exchange interaction J.

Keywords

strong electron correlations dynamical spin susceptibility high-temperature superconductivity t-J model 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • A. A. Vladimirov
    • 1
  • D. Ihle
    • 2
  • N. M. Plakida
    • 1
  1. 1.Joint Institute for Nuclear ResearchDubna, Moscow OblastRussia
  2. 2.Institute for Theoretical PhysicsLeipzig UniversityLeipzigGermany

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