Persistent Spin-Orbit Mott Insulating State in Highly Compressed Post-Perovskite CaIrO3

摘要

Electronic properties of CaIrO3 with the post-perovskite structure were investigated under experimental conditions of pressure up to 180GPa. By measuring the electrical resistivity under high pressure, we found that the Mon insulating state is robust up to 180 GPa. Extrapolation of the activation energy indicated suppression of the charge gap at 200 GPa. Furthermore, we found that the antiferromagnetic transition temperature marginally increases by applying a pressure of up to 9.3 GPa.