Low power resistive random access memory using interface-engineered dielectric stack of SiO_x/a-Si/TiO_y with 1D1R-like structure

In this study, we report a resistive random access memory (RRAM) using trilayer SiO_x/a-Si/TiO_y film structure. The low switching energy of <10 pJ, highly uniform current distribution (<13% variation), fast 50-ns speed and stable cycling endurance for 10⁶ cycles are simultaneously achieved in this RRAM device. Such good performance can be ascribed to the use of interface-engineered dielectric stack with 1D1R-like structure. The SiO_x tunnel barrier in contact with top Ni electrode to form diode-like rectifying element not only lowers self-compliance switching currents, but also improves cycling endurance, which is favorable for the application of high-density 3D memory.