Hopping effect of hydrogen-doped silicon oxide insert RRAM by supercritical CO2 fluid treatment

In this letter, we introduced hydrogen ions into titanium metal doped into SiO₂ thin film as the insulator of resistive random access memory (RRAM) by supercritical carbon dioxide (SCCO)₂ fluid treatment. After treatment, low resistance state split in to two states, we find the insert RRAM, which means it has an operating polarity opposite from normal RRAM. The difference of the insert RRAM is owing to the resistive switching dominated by hydrogen ions, dissociated from OH bond, which was not by oxygen ions as usual. The current conduction mechanism of insert RRAM was hopping conduction due to the metal titanium reduction reaction through SCCO₂.