PROJECT TITLE :
Evidence for Voltage-Driven Set/Reset Processes in Bipolar Switching RRAM
Understanding the physical mechanisms for resistance amendment in metal oxides may be a key challenge to assess the scalability of resistive-switching random access memory (RRAM) devices. From this standpoint, the time dependence of filament formation and dissolution in metal oxides will offer a helpful insight into the elemental mechanism of resistive switching. In this paper, we tend to show an experimental study of the time-dependent filament growth and of the voltage dependence of set/reset times in $hboxHfO_x$-primarily based RRAM devices. The voltage across the device is shown to be regulated at any given time irrespective of the compliance current and therefore the applied voltage, evidencing that voltage is that the controlling parameter for the filament formation and dissolution throughout switching. These results are explained in terms of a thermally-activated ion migration model for filamentary switching. The model allows for an analytical calculation of the scaling dependence of set/reset times and energies in RRAM.
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