ABSTRACT
Kondo’s perturbative calculation of the electrical resistivity up to third order in J showed that the spin exchange interaction leads to singular scattering of the conduction electrons near the Fermi level. Perturbation theory breaks down due to the appearance of lnT terms that diverge at low temperature, T. Such
logarithmic divergence also appears in other physical quantities, such as the magnetic susceptibility, entropy, and speci c heat (Hewson 1993). Combining the lnT divergence in the electrical resistivity (which increases at low temperature for an antiferromagnetic coupling) with the T 5 phonon contribution provided the explanation of the experimentally observed resistivity minimum at low temperature (Kondo 1964).
