A dual-functional Ta/TaO _x /Ru device with both nonlinear selector and resistive switching behaviors.

ABSTRACT: In this work, we demonstrate that a Ta/TaO _x /Ru device can act as both a highly uniform and nonlinear selection device and a stable resistive switching device, respectively, by controlling the voltage applied to the Ta electrode. As a selection device, it shows high selectivity (10³), high current density (25 kA cm^-2), very low variation, and good endurance. The non-linear performance of the device may be attributed to a trapezoidal band structure modulated by the concentration gradient of oxygen vacancies. Furthermore, with a large voltage bias on the Ta electrode, a repeatable and stable resistive switching behavior was observed, which could be attributed to the formation of conductive filaments probably composed of Ta metal and oxygen vacancies.

SUBMITTER: Wang R 

PROVIDER: S-EPMC9033434 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature