Extended Data Fig. 8 | Test results of the required programming pulse
number and programming currents. a, Average pulse number required to
reach each target conductance state. All the initial states were programmed to
4.0 μA. b, Stacked histogram distribution corresponding to the data in a. c,
Current–voltage curve obtained during a d.c. voltage sweep. RESET and SET
currents are measured at points #1 and #3, respectively. The conditions of
RESET and SET pulses in this study are marked by points #2 and #4,
respectively. Point #5 labels the read current at the low-resistance state (LRS)
and point #6 labels the read current at the high-resistance state (HRS). d,
Typical programming parameters. The programming current is 60 μA at 1.5 V
during the SET process and 45 μA at −1.2 V during RESET.