Electron-doped Sr 2 IrO 4− δ (0≤ δ≤ 0.04): Evolution of a disordered J eff= 1 2 Mott insulator into an exotic metallic state
Stoichiometric Sr 2 IrO 4 is a ferromagnetic J eff= 1 2 Mott insulator driven by strong spin-
orbit coupling. Introduction of very dilute oxygen vacancies into single-crystal Sr 2 IrO 4− δ
with δ≤ 0.04 leads to significant changes in lattice parameters and an insulator-to-metal
transition at T MI= 105 K. The highly anisotropic electrical resistivity of the low-temperature
metallic state for δ≈ 0.04 exhibits anomalous properties characterized by non-Ohmic
behavior and an abrupt current-induced transition in the resistivity at T∗= 52 K, which …
orbit coupling. Introduction of very dilute oxygen vacancies into single-crystal Sr 2 IrO 4− δ
with δ≤ 0.04 leads to significant changes in lattice parameters and an insulator-to-metal
transition at T MI= 105 K. The highly anisotropic electrical resistivity of the low-temperature
metallic state for δ≈ 0.04 exhibits anomalous properties characterized by non-Ohmic
behavior and an abrupt current-induced transition in the resistivity at T∗= 52 K, which …
Electron doped Sr2IrO4− δ (0≤ δ≤ 0.04): Evolution of a disordered Jeff= 1/2 Mott insulator into an exotic metallic state
Stoichiometric Sr 2 IrO 4 is a ferromagnetic J eff=[1/2] Mott insulator driven by strong spin-
orbit coupling. Introduction of very dilute oxygen vacancies into single-crystal Sr 2 IrO 4− δ
with δ≤ 0.04 leads to significant changes in lattice parameters and an insulator-to-metal
transition at T MI= 105 K. The highly anisotropic electrical resistivity of the low-temperature
metallic state for δ≈ 0.04 exhibits anomalous properties characterized by non-Ohmic
behavior and an abrupt current-induced transition in the resistivity at T*= 52 K, which …
orbit coupling. Introduction of very dilute oxygen vacancies into single-crystal Sr 2 IrO 4− δ
with δ≤ 0.04 leads to significant changes in lattice parameters and an insulator-to-metal
transition at T MI= 105 K. The highly anisotropic electrical resistivity of the low-temperature
metallic state for δ≈ 0.04 exhibits anomalous properties characterized by non-Ohmic
behavior and an abrupt current-induced transition in the resistivity at T*= 52 K, which …
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