Resistance switching in a single-crystalline NiO thin film grown on a Pt0.8Ir0.2 electrode

Abstract

A single-crystalline NiO thin film was grown epitaxially on an atomically flat ${\text{Pt}}_{0.8}{\text{Ir}}_{0.2}$ bottom electrode layer grown epitaxially on a ${\text{SrTiO}}_3\left(100\right)$ substrate. The memory cells of the single-crystalline NiO thin film with Pt top electrodes showed unipolar resistance switching behaviors. The result demonstrates that a unipolar resistance switching is not a characteristic phenomenon in the polycrystalline NiO but it can also occur in the single-crystalline NiO.