Determination of the phase coherence length of PdCo O2 nanostructures by conductance fluctuation analysis

T. Harada, P. Bredol, H. Inoue, S. Ito, J. Mannhart, A. Tsukazaki

Research output: Contribution to journalArticlepeer-review

Abstract

The two-dimensional layered compound PdCoO2 is one of the most conductive oxides, providing an intriguing research arena opened by the long mean free path and the very high mobility of ∼51000cm2/Vs. These properties turn PdCoO2 into a candidate material for nanoscale quantum devices. By exploring universal conductance fluctuations originating in nanoscale PdCoO2 Hall-bar devices, we determined the phase coherence length of electron transport in c-axis oriented PdCoO2 thin films to equal ∼100 nm. The weak temperature dependence of the measured phase coherence length suggests that defect scattering at twin boundaries in the PdCoO2 thin film governs phase breaking. These results suggest that phase coherent devices can be achieved by realizing the devices smaller than the size of twin domains, via refined microfabrication and suppression of twin boundaries.

Original languageEnglish
Article number045123
JournalPhysical Review B
Volume103
Issue number4
DOIs
Publication statusPublished - 2021 Jan 19

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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