Kondo Effect in the Hierarchical $$s-d$$s-d Model

  title={Kondo Effect in the Hierarchical \$\$s-d\$\$s-d Model},
  author={G. Gallavotti and Ian Jauslin},
  journal={Journal of Statistical Physics},
The $$s-d$$s-d model describes a chain of spin-1/2 electrons interacting magnetically with a two-level impurity. It was introduced to study the Kondo effect, in which the magnetic susceptibility of the impurity remains finite in the 0-temperature limit as long as the interaction of the impurity with the electrons is anti-ferromagnetic. A variant of this model was introduced by Andrei, which he proved was exactly solvable via Bethe Ansatz. A hierarchical version of Andrei’s model was studied by… Expand


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