AI Article Synopsis
- PdCoO(2) is the most conductive oxide known, with an impressive in-plane resistivity measurement of 2.6 μΩ cm at 295 K.
- The low-temperature resistivity shows an unusual activated dependence instead of the typical T(5) relationship, indicating a gapping in effective scattering likely due to phonon drag.
- At temperatures below 10 K, the transport mean free path reaches around 20 μm, which is significantly large for flux-grown crystals, suggesting unique material properties.
Article Abstract
We present de Haas-van Alphen and resistivity data on single crystals of the delafossite PdCoO(2). At 295 K we measure an in-plane resistivity of 2.6 μΩ cm, making PdCoO(2) the most conductive oxide known. The low-temperature in-plane resistivity has an activated rather than the usual T(5) temperature dependence, suggesting a gapping of effective scattering that is consistent with phonon drag. Below 10 K, the transport mean free path is ∼20 μm, approximately 10(5) lattice spacings and an astoundingly high value for flux-grown crystals. We discuss the origin of these properties in light of our data.
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