Ferroelectricity in hafnia-based systems seems to be correlated with oxygen vacancy dynamics, but the coupling of this and ferroelectric response is rarely studied. Here it is shown that Hf0.5Zr0.5O2 can be antiferroionic, with antiferroelectric behaviour coupled to surface electrochemistry.
- Kyle P. Kelley
- Anna N. Morozovska
- Sergei V. Kalinin