Current hysteresis by oxygen vacancy exchange between oxides in Pt/a-IGZO/TaO x /W.

Highlights: [•] We investigated current hysteresis mechanism in Pt/a-IGZO/TaO x /W structure that shows rectifying characteristics. [•] In order to understand the role of each layer and the origin of memory effect, we designed and performed two model experiments on the basis of preliminary experimental results and analysis. [•] Current hysteresis (memory effect) is attributed to the bias dependent resistance change in TaO x layer due to positively charged oxygen vacancy exchange between two oxides. [ABSTRACT FROM AUTHOR]