Recent Advances in Unconventional Ferroelectrics and Multiferroics

TL;DR

This paper reviews recent progress in unconventional ferroelectric and multiferroic materials, highlighting their unique properties, potential applications in nanoelectronics and spintronics, and discussing future research challenges.

Contribution

It provides a comprehensive overview of novel ferroelectric systems and multiferroic materials, emphasizing recent discoveries and their implications for future device technologies.

Findings

Identification of new ferroelectric mechanisms

Insights into multiferroic coupling phenomena

Discussion of challenges and future directions

Abstract

Emerging ferroic materials may pave a new way to next-generation nanoelectronic and spintronic devices due to their interesting physical properties. Here, we systematically review unconventional ferroelectric systems, from Hf-based and elementary ferroelectrics to stacking ferroelectricity, polar metallicity, fractional quantum ferroelectricity, wurtzite-type ferroelectricity, and freestanding membranes ferroelectricity. Moreover, multiferroic materials are reviewed, particularly the interplay between novel magnetic states and ferroelectricity, as well as ferrovalley-ferroelectric coupling. Finally, we conclude by discussing current challenges and future opportunities in this field.