Resistive switching properties in oxygen-deficient Pr0 ...
The lower the WF value, the higher the Schottky barrier and hence the junction resistance would be expected. As seen in the figure, the junction resistance follows the sequence: Au < Ag < Cu < Al , and the WFs for Au, Ag, Cu, and Al are 5.1, 4.26, 4.65, and 4.28 eV, 24 24.