title: Quantum oscillations and high carrier mobility in the delafossite PdCoO(2).
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.
authors.affiliation: Scottish Universities Physics Alliance, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom.
authors.forename: Clifford W
authors.initials: CW
authors.lastname: Hicks
authors.forename: Alexandra S
authors.initials: AS
authors.lastname: Gibbs
authors.forename: Andrew P
authors.initials: AP
authors.lastname: Mackenzie
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Takatsu
authors.forename: Yoshiteru
authors.initials: Y
authors.lastname: Maeno
authors.forename: Edward A
authors.initials: EA
authors.lastname: Yelland