Abstract In this work, the resistivity and magnetization of Bi 2 Ir 2 O 7 are investigated under hydrostatic pressure. At ambient pressure, the resistivity of Bi 2 Ir 2 O 7 exhibits a metallic behavior with the decrease of temperature. When the pressure is applied, a metal-insulator phase transition at low temperature is induced under a pressure of ∼ 0.48 GPa. The metal-insulator phase transition temperature ( T MI ) increases linearly with pressure as d T MI / dP = 3.4 ± 0.3 K / GPa . The temperature dependence of resistivity [ ρ ( T ) ] in the pressure-induced insulating phase exhibits a thermal activation behavior ( ρ = ρ 0 e Δ E / k B T ) , where the thermal activation energy ( Δ E ) increases monotonously with the pressure. Meanwhile, the magnetization is enhanced by the pressure, which indicates an enhancement of magnetic ordering. The results suggest that localization occurs due to the magnetic ordering induced by the pressure, which confirms the magneto-electronic coupling in Bi 2 Ir 2 O 7

中文翻译：

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烧绿石中压力引起的定位 Bi 2 Ir 2 O 7

摘要 本文研究了静水压力下Bi 2 Ir 2 O 7 的电阻率和磁化强度。在环境压力下，Bi 2 Ir 2 O 7 的电阻率随着温度的降低表现出金属行为。当施加压力时，在约 0.48 GPa 的压力下会引起低温下的金属-绝缘体相变。金属-绝缘体相变温度 (T MI ) 随压力线性增加，d T MI / dP = 3.4 ± 0.3 K / GPa。压力诱导绝缘相中电阻率 [ ρ ( T ) ] 的温度依赖性表现出热活化行为 ( ρ = ρ 0 e Δ E / k BT ) ，其中热活化能 ( Δ E ) 随压力单调增加。 . 同时，压力增强了磁化强度，这表明磁有序性增强。