A semiempirical model that can simulate dc and pulse (ac) characteristics of filament-type HfOx-based resistance change random access memory (ReRAM) devices has been developed. Time-dependent device characteristics, because of the dynamic change in the filament size, were emulated using a modified ion migration model. This model describes the difference between SET and RESET operations using a current crowding effect This model is a semiempirical model that can simultaneously match both dc and ac characteristics of HfOx-based ReRAM devices.
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Noh et al. (2013) studied this question.
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