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(Color online) Voltage fluctuations power spectrum of and systems at and , respectively. The value of was common to all films with an adhesion layer. For comparison, we plot two lines with slopes and 1, respectively. The linear regression fit to the data in the scaling range, gives slopes of and for and , respectively.
Plot of the exponent as a function of the temperature for wires with and without an adhesion layer. Wires having an adhesion layer have a value of consistent with the value of arising from the long range diffusions.
Plot of vs f for . The solid lines are the fit to the theoretical power spectrum. The inset shows vs .
Plots of vs for wire at different temperatures showing the collapse of the data on a single curve as predicted by the diffusion model.
Plots of vs showing a thermally activated process in films with an adhesion layer.
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