Time-dependent universal conductance fluctuations in IrO2 nanowires

Yong Han Lin, Lu Yao Wang*, Juhn-Jong Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

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.

Original languageEnglish
Article number673
Pages (from-to)1-5
Number of pages5
JournalNanoscale Research Letters
Volume7
Issue number1
DOIs
StatePublished - 2012

Keywords

  • Iridium dioxide nanowire
  • Mobile defect
  • Quantum-interference effect
  • Rutile structure
  • Universal conductance fluctuation

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