On the Optimal ON/OFF Resistance Ratio for Resistive Switching Element in One-Selector One-Resistor Crosspoint Arrays

This letter investigates the impact of resistive switching element (RSE) parameters on the read performance of a two-terminal one-selector one-resistor cell. SPICE array simulation results show that the reducing RLRSimproves the read margin (RM) but trades off with power consumption (PR). While increasing RHRSimproves the RM, too large a value leads to RM degradation when RHRSexceeds an optimal value. Therefore, choosing RHRS/RLRSratio optimally is needed to maximize the RM while balancing PR. A highly nonlinear selector increases the optimal RHRS/RLRSratio. However, further increasing the RSE toward higher optimal RHRS/RLRSratio has only limited impact on the RM.