The rich phase diagrams and peculiar physical properties of rare earth perovskite nickelates (RNiO₃) have recently attracted much attention. Their electronic structures are highly sensitive to carrier density and bandwidth due to Mott physics. Here, the electrochemically driven giant resistive switching in Pt/RNiO₃/Nb‐SrTiO₃ heterostructures is reported. Systematic investigation confirms that oxygen vacancies migration modifies the interfacial barrier at the RNiO₃/Nb‐SrTiO₃ interface and causes the resistive switching behavior. An ON/OFF ratio of about 10⁵ at room temperature is observed, which can be modulated by controlling the oxygen vacancies during sample fabrication or by varying the rare earth element in RNiO₃. The findings provide an important step forward toward the development of multifunctional electronic devices based on perovskite nickelates.

中文翻译：

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钙钛矿镍盐异质结构中的电化学驱动巨阻开关

稀土钙钛矿镍酸盐（RNiO ₃）的丰富相图和独特的物理性质最近引起了很多关注。由于莫特物理学的原因，它们的电子结构对载流子密度和带宽高度敏感。在此，报道了Pt / RNiO ₃ / Nb-SrTiO ₃异质结构中的电化学驱动的巨电阻开关。系统研究证实，氧空位迁移会改变RNiO ₃ / Nb-SrTiO ₃界面处的界面势垒并引起电阻切换行为。开/关比约为10 ⁵在室温下观察到，可以通过控制样品制备过程中的氧空位或通过改变RNiO _3中的稀土元素来进行调节。这些发现为基于钙钛矿镍酸盐的多功能电子设备的开发迈出了重要的一步。