Properties of the heavy-fermion spectrum in the canted phase of antiferromagnetic intermetallides

摘要: We study the effect of magnetic-field-induced canting magnetic sublattices on energy structure heavy fermion quasiparticles in intermetallides with antiferromagnetic-type ordering. work framework an effective Hamiltonian periodic Anderson model regime strong electron correlations. With virtual transfers into high-energy double states taken account, this involves exchange interactions between spin moments f ions and s-f-exchange coupling two subsystems. For a noncollinear problem geometry, we introduce unitary transformation that allows reducing eighth-order equation for spectrum fermions to fourth-order equations. show quasimomentum dependence heavy-fermion changes qualitatively under transition from antiferromagnetic phase considerable angle emerging external field.