title: Non-quasiparticle states in a half-metallic ferromagnet with antiferromagnetic s-d(f) interaction.
abstract: Non-quasiparticle (incoherent) states which play an important role in the electronic structure of half-metallic ferromagnets (HMF) are investigated consistently in the case of antiferromagnetic s-d(f) exchange interaction. Their appropriate description in the limit of strong correlations requires a rearrangement of perturbation series in comparison with the usual Dyson equation. This consideration provides a solution of the Kondo problem in the HMF case and can be important for first-principle HMF calculations performed earlier for ferromagnetic s-d(f) interaction.
authors: Institute of Metal Physics, 620990 Ekaterinburg, Russia.
authors: V Yu
authors: VY
authors: Irkhin