Role of the d-f Coulomb interaction in intermediate valence and Kondo systems: a numerical renormalization group study

Abstract

Using numerical renormalization group method the temperature dependences of the magnetic susceptibility $\chi (T)$ and specific heat $C(T)$ are obtained in the single-impurity Anderson model with inclusion of the $d-f$ Coulomb interaction. It is shown that the exciton effects owing to this interaction can change considerably the dependence $C(T)$ in comparison with the standard Anderson model at not too low temperatures, whereas the dependence $\chi (T)$ remains universal. The renormalization of the effective hybridization parameter and $f$-level position, which is connected with the $d-f$ interaction, is calculated, a satisfactory agreement with the Hartree-Fock approximation being derived.

References in corpus (3)

• Exact solution of the Falicov-Kimball model with dynamical mean-field theory
• Renormalized Parameters for Impurity Models
• Exciton effects in a scaling theory of intermediate valence and Kondo systems

Cited by in corpus (2)

• The numerical renormalization group method for quantum impurity systems
• Three-body Fermi liquid corrections for an infinite-$U$ SU($N$) Anderson impurity model