Issue 9, 2022

Control of up-to-down/down-to-up light-induced ferroelectric polarization reversal

Abstract

Light control of ferroelectric polarization is of interest for the exploitation of ferroelectric thin films in ultrafast data storage and logic functionalities. The rapidly oscillating electric field of light absorbed in a ferroelectric layer can suppress its polarization but cannot selectively reverse its direction. Here we take advantage of the built-in asymmetry at ferroelectric/electrode interfaces to break the up/down symmetry in uniaxial ferroelectrics to promote polarization reversal under illumination. It is shown that appropriate ferroelectric/metal structures allow the direction of the imprint electric field to be selected, which is instrumental for polarization reversal. This ability is further exploited by demonstrating the optical control of the resistance states in a ferroelectric capacitor.

Graphical abstract: Control of up-to-down/down-to-up light-induced ferroelectric polarization reversal

Supplementary files

Article information

Article type
Communication
Submitted
24 5 2022
Accepted
02 8 2022
First published
04 8 2022
This article is Open Access
Creative Commons BY license

Mater. Horiz., 2022,9, 2345-2352

Control of up-to-down/down-to-up light-induced ferroelectric polarization reversal

H. Tan, G. Castro, J. Lyu, P. Loza-Alvarez, F. Sánchez, J. Fontcuberta and I. Fina, Mater. Horiz., 2022, 9, 2345 DOI: 10.1039/D2MH00644H

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