Browsing by Author "Zhao, L."

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Multi-level control of conductive nano-filament evolution in HfO2 ReRAM by pulse-train operations
(2014-06-07)
Zhao, L.
;
Chen, H. -Y.
;
Wu, S. -C.
;
Jiang, Z.
;
Yu, S.
Precise electrical manipulation of nanoscale defects such as vacancy nano-filaments is highly desired for the multi-level control of ReRAM. In this paper we present a systematic investigation on the pulse-train operation scheme for reliable multi-level control of conductive filament evolution. By applying the pulse-train scheme to a 3 bit per cell HfO2 ReRAM, the relative standard deviations of resistance levels are improved up to 80% compared to the single-pulse scheme. The observed exponential relationship between the saturated resistance and the pulse amplitude provides evidence for the gap-formation model of the filament-rupture process.