The effect of high pressure on the electronic characteristics of CoO is analyzed in the framework of the multielectron model of transition metal oxides. The specific features of spin crossover for d⁷ terms of Co²⁺ are compared to those characteristic of d⁵ and d⁶ configurations. A pressure-induced transition between antiferromagnetic and ferromagnetic states at the spin crossover point is predicted. A model is proposed to describe the pressure-induced variation of the electrical resistance exhibiting a stepwise change by eight orders of magnitude at the structural transition point observed at 43 GPa and the subsequent metallization above 133 GPa.

中文翻译：

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绝缘子的机理-高压下CoO中的金属转变和自旋交叉

在过渡金属氧化物的多电子模型框架内分析了高压对CoO电子特性的影响。将d ⁷项Co ²⁺的自旋交叉的特定特征与d ⁵和d ⁶构型的特征进行了比较。可以预测在自旋交叉点上反铁磁状态和铁磁状态之间的压力诱导的跃迁。提出了一个模型来描述压力引起的电阻变化，该变化在43 GPa处观察到的结构转变点处呈现出8个数量级的逐步变化，随后在133 GPa以上发生金属化。