Time-dependent universal conductance fluctuations and coherence in AuPd and Ag

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dc.creatorTrionfi, A.
dc.creatorLee, S.
dc.creatorNatelson, D.
dc.date2004-10-11
dc.date2004-12-21
dc.date.accessioned2026-07-07T03:01:24Z
dc.date.available2026-07-07T03:01:24Z
dc.descriptionQuantum transport phenomena allow experimental assessment of the phase coherence information in metals. We report quantitative comparisons of coherence lengths inferred from weak localization magnetoresistance measurements and time-dependent universal conductance fluctuation data. We describe these two measurements and their analysis. Strong agreement is observed in both quasi-2D and quasi-1D AuPd samples, a metal known to have high spin-orbit scattering. However, quantitative {\it disagreement} is seen in quasi-1D Ag wires below 10 K, a material with intermediate spin-orbit scattering. We consider explanations of this discrepancy, with particular emphasis on the theoretical expressions used to analyze the field dependence of the conductance fluctuations. We also discuss the mechanism of the suppression of conductance fluctuations at high drive levels, and dephasing mechanisms at work in these systems.
dc.description10 pages, 8 figures, revised, sub. to PRB
dc.identifierhttps://arxiv.org/abs/cond-mat/0410261
dc.identifierhttp://arxiv.org/abs/cond-mat/0410261
dc.identifierPhys. Rev. B 72, 035407 (2005)
dc.identifierdoi:10.1103/PhysRevB.72.035407
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25042
dc.subjectMesoscale and Nanoscale Physics
dc.subjectDisordered Systems and Neural Networks
dc.titleTime-dependent universal conductance fluctuations and coherence in AuPd and Ag
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