Figure 4
Comparison between DC and AC properties of non-metallic samples. The temperature dependencies of the normalized resistance R/R300K (a) and of the Noise Level NL (b), as evaluated from Eq. (2), are shown for PMMA (squares) and SA (circles) films. The NL peaks, corresponding to the different resistance minima observed, are evidenced with green and yellow arrows for PMMA and SA, respectively.
