Identification of the controlling parameter for the set-state resistance of a TiO_2 resistive switching cell

摘要

This study examined the parameter controlling the set-state resistance (R_(set)) of a Pt/TiO_2/Pt resistive switching (RS) cell in unipolar RS mode. Although the compliance current in the current-voltage sweep had some effect on the R_(set), the uncontrolled flow of charge from the parametric analyzer prevented making an accurate estimation of the parameters. The current transient in pulse switching observed using a high-speed digital oscilloscope and physical modeling showed that the capacitive charge moves vigorously at the moment of on-switching, and R_(set) is governed by the level of migrating charge. The actual switching time was 《50 ns.