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arXiv · 1207.5402

Quantum oscillations and high carrier mobility in the delafossite PdCoO$_2$

Clifford W. Hicks·Alexandra S. Gibbs·Andrew P. Mackenzie·Hiroshi Takatsu·Yoshiteru Maeno·Edward A. Yelland
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Abstract

We present de Haas-van Alphen and resistivity data on single crystals of the delafossite PdCoO2. At 295 K we measure an in-plane resistivity of 2.6 μΩ-cm, making PdCoO2 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 \mum, 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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Clifford W. Hicks, Alexandra S. Gibbs, Andrew P. Mackenzie, Hiroshi Takatsu, Yoshiteru Maeno, Edward A. Yelland. 2012-07-23. Quantum oscillations and high carrier mobility in the delafossite PdCoO$_2$. https://doi.org/10.1103/physrevlett.109.116401

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