Time dependent universal conductance fluctuations in AuPd, Ag, and Au wires

Quantum transport phenomena allow experimental determinations of the phase coherence information in metals. We report quantitative comparisons of inferred coherence lengths from weak localization magnetoresistance measurements and time-dependent universal conductance fluctuation data. A detailed explanation of how these two measurements are performed and analyzed will be given. Strong agreement is observed in both quasi-2D and quasi-1D AuPd samples, a metal known to have high spin-orbit scattering. However, quantitative agreement is not seen in quasi-1D Ag wires below 10 K, a material with intermediate spin-orbit scattering. Possible explanations for this disagreement are discussed. An enhancement of the conductance fluctuations in Au has also been observed by depositing a thin layer of Al$_{2}$O$_{x}$, an oxide known to have a large number of mobile two level systems, over the sample. Preliminary results will be reported.