Fig. 1: Structure and resistive switching (RS) characteristics of an electrochemical metallization (ECM) device with a single-crystalline CrPS4 electrolyte.

a schematic diagram and b cross-sectional transmission electron microscopy (TEM) image. c RS characteristics of an ECM device with a single-crystalline CrPS4 electrolyte. d TEM image of a single-crystalline CrPS4 flake. The inset of (d) shows its fast Fourier transform pattern.