Effect of ion diffusion on switching voltage of solid-electrolyte nanometer switch

A solid electrolyte switch turns on or off when a metallic bridge is formed or dissolved respectively in the solid electrolyte (here we use Cu2-alpha S). For logic applications, the switching voltage (< 0.3 V) should be larger than the operating voltage of the logic circuit (about I V). We reveal that the switching voltage is mainly affected by Cu+ ionic transport in Cu2-alpha S and that a solid electrolyte with an ion diffusion coefficient smaller than that of Cu2-alpha S by several tens of orders of magnitude makes it possible to increase the switching voltage to I V.