A TiO2-based volatile threshold switching selector device with 107 non linearity and sub 100 pA Off current

Abstract

ReRAM crossbar arrays are known to be susceptible to the presence of the sneak current issue during the readout operations which undermines crossbar scaling. This problem can be solved by the addition of an highly non-linear two-terminal selector device. In this work we present a 5 nm thick TiO2-based selector which exploits a volatile threshold resistive switching, so far unreported for this material. The device shows a current density up to 100 kA/cm2, 107 current non-linearity and a 4 V voltage margin, the highest reported for TiO2-based selectors and sub 100 pA off current.