Scaling of the electrical conductivity of ultrathin amorphous palladium films

The temperature-dependent electrical conductances of sets of ultrathin amorphous Pd films prepared by successive deposition in situ at low temperatures have been found to scale over a range of conductances encompassing both the strongly and weakly localized regimes. This scaling, as well as the variation of the scaling parameter with the Boltzmann conductance, suggests a unified picture of the insulator-to-metal transition in two dimensions. (orig.)