H. Wilson's theory 1,2 of semi-conductivity. The accompanying curves (Fig. 1) illustrate the decrease in the electrical resistance of tellurium by the addition of copper and antimony.
Figure 3 is a basic list of metal conductivity. The precious metal, silver on top, like gold below copper, are pricey and often used only sparingly in applications like contacts. Though the other ...
Kwapuliński, P. Rasek, J. and Gierak, Z. 1988. Scattering of conductivity electrons on grain boundaries in metals. Physica Status Solidi (a), Vol. 107, Issue. 1, p. 299.