Analysis of Transient Currents During Ultrafast Switching of $\hbox{TiO}_{2}$ Nanocrossbar Devices

In this letter, bipolar fast-pulse switching in TiO
₂
-based nanocrossbar devices was investigated. A dedicated measurement setup was used to measure the transient currents during 5-ns resistive switching. Transient peak currents for the set and reset processes were as high as 200 and 230 μA, respectively. The currents observed during fast-pulse switching are explained and simulated by Joule heating, which is needed for fast oxygen-vacancy movement. The measured transient currents enable a further optimization of resistive switches based on TiO
₂
.