Controlling Memristance and Negative Differential Resistance in Point-Contacted Metal-Oxides-Metal Heterojunctions: Role of Oxygen Vacancy Electromigration and Electron Hopping. - Xin Gan; Yueying Zhang; Yupeng Hui; Shaoxuan Liu; Lei Wang; Jincheng Zhang; Yue Hao 001; Haijiao Harsan Ma (Adv. Intell. Syst., 2022)