Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 42: Magnetic Materials III

MA 42.2: Vortrag

Donnerstag, 3. April 2014, 15:15–15:30, HSZ 04

Quantum oscillations and high carrier mobility in the delafossites PdCoO2 and PdCrO2 — •Clifford Hicks^1,2, Alexandra Gibbs¹, Andrew Mackenzie^1,2, Hiroshi Takatsu^3,4, Yoshiteru Maeno⁴, and Edward Yelland¹ — ¹University of St Andrews, St Andrews, United Kingdom — ²Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — ³Tokyo Metropolitan University, Tokyo, Japan — ⁴Kyoto University, Kyoto, Japan

We present torque magnetometry and resistivity data on single crystals of the delafossites PdCoO₂ and PdCrO₂. At 295 K we measure an in-plane resistivity of 2.6 µ Ω-cm in PdCoO₂, making it the most conductive oxide known. PdCrO₂ has the same crystal structure as PdCoO₂, but is a triangular antiferromagnetic metal. Apart from the addition of the magnetism, the electronic structure of PdCrO₂ is strikingly similar to that of PdCoO₂, and comparison of these two metals provides an opportunity to isolate the effects of the magnetism.