The perovskite NaOsO₃ has a metal–insulator transition at temperature 410 K, which is delicate, intriguing, and provokes a lot of debate on its nature. Our combined electrical resistance, Raman, and synchrotron x-ray diffraction experiments show that the insulating ground state in this osmate endures under high pressure up to at least 35 GPa. In this pressure range, compression reveals hidden hysteretic resistance properties with a transient metallic state near 200 K, manifested three electronic character anomalies (at 1.7, 9.0, and 25.5 GPa), and a structural transition to the singular polar phase (at ~18 GPa). We distinguish NaOsO₃ from the regular crystallographic behavior of perovskites, though the electrical specificities resemble iridates and nickelates. The theoretical first-principle band structure and lattice dynamics calculations demonstrate that the magnetically itinerant Lifshitz-type mechanism with spin–orbit and spin–phonon interactions is responsible for these pressure-induced changes. Our findings provide another new playground for the emergence of new states in 5d materials by using high-pressure methods.

钙钛矿NaOsO ₃在410 K的温度下具有金属-绝缘体的转变，这种转变精致而引人入胜，并引发了关于其性质的许多争论。我们的电阻，拉曼光谱和同步加速器X射线衍射实验相结合，表明该渗透物中的绝缘基态可承受高达35 GPa的高压。在此压力范围内，压缩揭示了具有200 K附近瞬态金属态的隐藏的滞回电阻特性，表现出三个电子特性异常（在1.7、9.0和25.5 GPa时），并且结构转变为奇异极性相（在〜18 GPa时） ）。我们区分NaOsO ₃从钙钛矿的常规晶体学行为来看，尽管电学特性类似于铱酸盐和镍酸盐。理论上的第一原理带结构和晶格动力学计算表明，具有自旋轨道和自旋声子相互作用的磁迭代Lifshitz型机理是这些压力引起的变化的原因。我们的发现为使用高压方法在5 d材料中出现新状态提供了另一个新的场所。