The derivation of the analytic expressions of the dynamical susceptibility based on the Hubbard-Hirsch Hamiltonian

  • B E Iyorsor
  • R Okanigbuan
  • J o Idiodi

Abstract



Investigation have been carried out on the spin wave energy of a ferromagnet using the random-phase approximation (RPA) in the Stoner model. Based on the Hubbard-Hirsch Hamiltonian, in this paper we study the spin excitation in an itinerant-electron system with the Hartree-Fock Approximation (HFA) to derive the analytic expressions of the dynamical susceptibility of the spin system, by setting up the equation of motion and solving it in a generalized HFA of the susceptibility tensor, Χ-+, and quoting the result for the first derivative of the Green's function.

Journal of the Nigerian Association of Mathematical Physics Vol. 10 2006: pp. 579-582
Published
2008-05-22
Section
Articles

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eISSN: 1116-4336