The Kondo effect in periodic narrow-band systems
Institute of Metal Physics, 620219 Ekaterinburg, Russia
Corresponding author: a Valentin.Irkhin@imp.uran.ru
Revised: 31 January 2000
Published online: 15 August 2000
The Kondo divergences owing to interaction of current carriers with local moments in highly correlated electron systems are considered within the Hubbard and s-d exchange models with infinitely strong on-site interaction, the many-electron Hubbard representation being used. The picture of density of states containing a peak at the Fermi level is obtained. Various forms of the self-consistent approximation are used. The problem of the violation of analytical properties of the Green's function is discussed. Smearing of the “Kondo” peak owing to spin dynamics and finite temperatures is investigated.
PACS: 71.10.Fd – Lattice fermion models (Hubbard model, etc.) / 71.27.+a – Strongly correlated electron systems; heavy fermions / 71.28.+d – Narrow-band systems; intermediate-valence solids
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000