材料科学
金属-绝缘体过渡
过渡金属
单晶
电流
凝聚态物理
绝缘体(电)
电流(流体)
光电子学
金属
冶金
结晶学
化学
物理
热力学
生物化学
量子力学
催化作用
作者
Bin You,Yong Liu,Honggang Zhu,Houliang Wang,Rui Xiong,Ching Liang Lu
摘要
A series of single crystal Sr2Ir1–xRuxO4 (0 ≤ x ≤ 0.55) have been synthesized, and their physical properties have been investigated. Ru-substitution at Ir-site can drastically reduce the resistivity, which is accompanied by serious suppression of the long range antiferromagnetic order. With the application of electric current, remarkable electroresistance exceeding 90% is obtained at x ∼ 0.2, which may contain significant contribution from the strong magnetic competitions. Interestingly, insulator–metal transition driven by electric current is observed (e.g., below 100 K), which can be ascribed to the lattice modulation. The findings indicate that the electric current can be an efficient route to tune the physical properties of the Jeff = 1/2 Mott insulator.
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