Single-crystalline iridium dioxide nanowires show the time-dependent universal conductance fluctuations (TUCFs) at cryogenic temperatures. The conductance fluctuations persist up to temperature T as high as nearly 10 K. The root-mean-square TUCF magnitudes increase with decreasing T, reaching approximately 0.1 e2 / h at 1.7 K. We ascribe these conductance fluctuations to originating from the conduction electrons scattering upon mobile defects (moving scattering centers). Our measured TUCF characteristics are satisfactorily explained in terms of the existing TUCF theory in its three-dimensional form. The extracted electron dephasing length Lφ(1.7 K) ≃90 nm is smaller than the diameter (≈ 180 nm) of our nanowires.
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机译：单晶二氧化铱纳米线在低温下显示出随时间变化的通用电导波动（TUCF）。直到温度T高达10 K时，电导波动仍持续存在。均方根TUCF幅度随着T的降低而增加，在1.7 K时达到约0.1 e 2 / h。我们将这些电导归因于波动源于在移动缺陷（移动的散射中心）上散射的传导电子。根据现有的TUCF理论的三维形式，可以令人满意地解释我们测得的TUCF特性。提取的电子移相长度Lφ（1.7 K）≃90nm小于我们纳米线的直径（≈180 nm）。
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