Three-Terminal Copper-Driven Neuromorphic Device

A switching device, comprising:

• a channel layer disposed on a substrate;
• a source contact and a drain contact disposed on opposite ends of the channel layer;
• a solid electrolyte disposed on the channel layer over the source contact and the drain contact, wherein the solid electrolyte comprises a Cu-based ionic conductor having a formula CuxAyBz, wherein A is selected from the group consisting of:
• Rb, Cs, K, Na, Li and combinations thereof, wherein B is selected from the group consisting of:
• F, Cl, Br, I and combinations thereof, and wherein 0<x<20, 0<y<10, and 0<z<30;
• and
• a gate disposed on the solid electrolyte, wherein the gate comprises Cu, and wherein the source contact, the drain contact, and the gate comprise three terminals of the switching device.

A method of operating a switching device, the method comprising the steps of:

• applying a voltage pulse to the switching device, wherein the switching device comprises:
• a channel layer disposed on a substrate;
• a source contact and a drain contact disposed on opposite ends of the channel layer;
• a solid electrolyte disposed on the channel layer over the source contact and the drain contact;
• a gate disposed on the solid electrolyte, wherein the first voltage pulse causes ion transport from the gate through the solid electrolyte to the channel layer;
• and
• reading a resistance state of the switching device.