Impurity resistivity in systems with a fluctuating valence
Fetisov E. P., Khomskii D. I.
The temperature dependence of the impurity resistivity in compounds with an intermediate valence and with heavy fermions is examined. At low temperatures the resistivity falls oiFaspimp (T)~pQ — aT2, but at high temperatures the resistivity of the system with impurities in an incoherent regime may fall below the resistivity of the pure system.