Robust Magnetoelectric Coupling in FeTiO3/Ga2O3 Non-van der Waals Heterostructures

Cui Jin, Xiao Tang, Qilong Sun, Chenxi Mu, Arkady V. Krasheninnikov, Liangzhi Kou*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Magnetoelectric coupling represents a significant breakthrough for next-generation electronics, offering the ability to achieve nonvolatile magnetic control via electrical means. In this comprehensive investigation, leveraging first-principles calculations, we unveil a robust magnetoelectric coupling within multiferroic heterostructures (HSs) by ingeniously integrating a non-van der Waals (non-vdW) magnetic FeTiO3 monolayer with the ferroelectric (FE) Ga2O3. Diverging from conventional van der Waals (vdW) multiferroic HSs, the magnetic states of the FeTiO3 monolayer can be efficiently toggled between ferromagnetic (FM) and antiferromagnetic (AFM) configurations by reversing the polarization of the Ga2O3 monolayer. This intriguing phenomenon arises from polarization-dependent substantial interlayer electron transfers and the interplay between superexchange and direct-exchange magnetic couplings of the iron atoms. The carrier-mediated interfacial interactions induce crucial shifts in Fermi level positions, decisively imparting distinct electronic characteristics near the Fermi level of composite systems. These novel findings offer exciting prospects for the future of magnetoelectric technology.

Original languageEnglish
Pages (from-to)2650-2657
Number of pages8
JournalJournal of Physical Chemistry Letters
Volume15
Issue number10
Early online date2024
DOIs
Publication statusPublished - 14 Mar 2024
MoE publication typeA1 Journal article-refereed

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