Abstract
We have successfully synthesized Ca1−xNaxIrO3 with the post-perovskite structure and elucidated their electronic properties. CaIrO3 is a S=1/2 antiferromagnetic Mott insulator with the Néel temperature (TN) of 115K. A gradual decrease in TN upon carrier doping culminates in a paramagnetic state at x∼0.3 with the simultaneous change from an insulator to a metal. The metallic state for x⩾0.31 shows the non-Fermi liquid behavior originating from antiferromagnetic fluctuations.
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