Nonquasiparticle states and nature of the electron spectrum in iron and nickel
Irkhin V. Yu., Katsnel'son M. I., Trefilov A. V.
A new model is proposed for the strong ferromagnetism of 3d metals. This model occupies an intermediate position between the Hubbard model and the s-d exchange model. The role of nonquasiparticle (spin-polaron) states lying near EF is discussed. In particular, the role of these states in an interpretation of experimental data on the spin polarization of electrons and the temperature dependence of the resistance is discussed.