A-Site Columnar-Ordered Perovskite CaZnV₂O₆ as a Pauli-Paramagnetic Metal

Inthis study, we successfully synthesized a novel A-sitecolumnar-orderedperovskite CaZnV2O6. This compound featuresa square-planar-coordinated Zn2+ disorder, which is thesame characteristic as the centrosymmetric paraelectric CaMnTi2O6. Unlike CaMnTi2O6, whichshows a centrosymmetric paraelectric-noncentrosymmetric ferroelectrictransition, CaZnV2O6 retains Pauli-paramagneticmetallicity arising from itinerant V4+ d(1) electronsand centrosymmetry down to 5 K. Based on analogous compounds, we expectCaZnV(2)O(6) to provide a new playground for theelectronic and magnetic states of V4+. We have synthesized a novel A-site columnar-orderedperovskite-typecompound, CaZnV2O6, and investigated its electronicand magnetic states experimentally and computationally. This compoundis found to be a Pauli-paramagnetic correlated metal. It will providea new playground for electronic and magnetic states of V4+.