Redox-based resistive switching in ferroelectric perovskite nanotubes

Abstract

Hysteresis in current and ferroelectric piezoelectric phase were collected across the walls of individual, electrically interfaced lead zirconate titanate (PZT) nanotubes. The nanotubes exhibit average on/off current ratios of ∼10 and ∼1000 in static local probe and top-electroded configurations, respectively. Reversibility in conduction state of an individual nanotube following different stages of an O2-rich/O2-deficient/O2-rich anneal cycle provide evidence of an oxygen vacancy concentration-based conduction mechanism.