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.

7 pages, final version, technical misprints are corrected

References in corpus (1)

• Half-metallic ferromagnets: From band structure to many-body effects

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• Nonequilibrium magnons from hot electrons in antiferromagnetic systems
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