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Resistive switching memory (RRAM) based on a solid-elelctrolyte insulator is a promising nanoscale device and has great potentials in nonvolatile memory,analog circuits and neuromorphic application.A typical solid electrolyte-based RRAM (often called electrochemical metailization (ECM) memory) device is formed by an electrochemically active electrode (e.g.Cu or Ag)/solid electrolyte insulator/inert electrode (e.g.Pt or W)trilayer structure.