Perspective on 2D perovskite ferroelectrics and multiferroics

TL;DR

This paper reviews recent advances in 2D perovskite ferroelectrics and multiferroics, highlighting new mechanisms, challenges, and future directions in the field of inorganic 2D materials for electronic applications.

Contribution

It provides a comprehensive overview of the research progress, focusing on improper ferroelectricity and magnetoelectric coupling mechanisms in 2D perovskite systems.

Findings

Discovery of improper ferroelectricity in 2D perovskites

Identification of novel magnetoelectric coupling mechanisms

Discussion of challenges and future research directions

Abstract

Two-dimensional (2D) ferroelectrics and multiferroics have attracted considerable scientific and technological interest in recent years due to the increasing demands for miniaturization and low energy consumption of electronic devices. At present, the research on 2D ferroelectrics and multiferroics is still focused on van der Waals materials, while the known bulk ferroelectric and multiferroic materials are mostly found in perovskite systems. The ability to prepare and transfer 2D perovskite oxides has provided unprecedented opportunities for developing ferroelectrics and multiferroics based on 2D perovskites. In this Perspective, we review the research progress on 2D ferroelectrics and multiferroics in inorganic perovskites in terms of different ferroelectric and magnetoelectric coupling mechanisms. The improper ferroelectricity and novel magnetoelectric coupling mechanisms discovered in 2D perovskites are emphasized, and then, the main challenges and future development direction are put forward.