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

In this study, we successfully synthesized a novel A-site columnar-ordered perovskite CaZnV₂O₆. This compound features a square-planar-coordinated Zn²⁺ disorder, which is the same characteristic as the centrosymmetric paraelectric CaMnTi₂O₆. Unlike CaMnTi₂O₆, which shows a centrosymmetric paraelectric-noncentrosymmetric ferroelectric transition, CaZnV₂O₆ retains Pauli-paramagnetic metallicity arising from itinerant V⁴⁺ d¹ electrons and centrosymmetry down to 5 K. Based on analogous compounds, we expect CaZnV₂O₆ to provide a new playground for the electronic and magnetic states of V⁴⁺.