The conical shape filament growth model in unipolar resistance switching of TiO2 thin film

Kim, Kyung Min; Hwang, Cheol Seong
March 2009
Applied Physics Letters;3/23/2009, Vol. 94 Issue 12, p122109
Academic Journal
This study examined the relationship between the conducting filament resistance and reset voltage during the resistance switching of TiO2 thin films assuming a filament with a conical shape. There was a critical resistance (∼20 Ω) of the set state above and below which the filament responded differently in response to the current. Maintaining a higher set state resistance was more beneficial in achieving a more uniform reset voltage. This filament model coincides well with the localized switching behavior and the recently microscopically observed filament shape.


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