Influence of spin-flip scattering on the stability of ferromagnetism in a two-band Hubbard model

Details Influence of spin-flip scattering on the stability of ferromagnetism in a two-band Hubbard model Influence of spin-flip scattering on the stability of ferromagnetism in a two-band Hubbard model

1999-05-27

arxiv.org/abs/cond-mat/9905396v1

J. Phys.: Condens. Matter 11 (1999) 5811

Physics

Condensed Matter

Strongly Correlated Electrons

17 pages, 6 figures, to be published in J. Phys: Cond. Mat

Scientific paper

10.1088/0953-8984/11/30/311

We investigate the influence of an interband exchange interaction on magnetism in a two-band Hubbard model. Our main emphasis lies on spin-flip scattering which is often neglected but is neccessary to retain the full rotational symmetry of the Hamiltonian. We find a striking dependence of the magnetization on the interband exchange coupling constant J and a substantial suppression of ferromagnetic order for a large range of values of J. The onset of an RKKY-like magnetic ordering mechanism is also observed.

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