Abstract
Abstract We report on three attempts to metallize a S = 1 2 antiferromagnetic Mott insulator CaIrO3 with the quasi-two-dimensional post-perovskite structure. By controlling the dimensionality and the electron filling, we can successfully drive a metal–insulator transition, while an insulating state is robust against the applied pressure. These results are compared with related experiments for the post-perovskite Mg0.9Fe0.1SiO4, the layered perovskite Ca2RuO4, and high- T c cuprates. The interplay between spin, charge, and orbital degrees of freedom is discussed.
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