Single-ion scaling and unconventional Kondo behavior in the electrical resistivity of the U1-xThxPd2Al3 system

We report measurements of the temperature T dependence of the electrical re sistivity rho of the U1-xThxPd2Al3 system for thorium concentrations 0.6 le ss than or equal to x less than or equal to 1.0 in the temperature range 0. 02 K less than or equal to T less than or equal to 300 K. These measurement s reveal an unconventional Kondo effect with an effective Kondo temperature T-K approximate to 20 K, which is independent of thorium concentration. Th e rho(T) data below T-K scale with U concentration (1-x) and T-K in agreeme nt with the scaling of C(T) and chi(T) at low temperature that was previous ly established. Analysis of the data below 20 K indicates that the electric al resistivity in the non-Fermi-liquid regime saturates as a power law at t he lowest temperatures with the form rho(T)similar to 1-a(T/T-K)(n) with n similar to 1.5.