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

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2024-02-29 DOI:10.1021/acs.jpclett.4c00029

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

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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.

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FeTiO3/Ga2O3 非范德华异质结构中的稳健磁电耦合

磁电耦合是下一代电子技术的重大突破，它提供了通过电学手段实现非易失性磁控制的能力。在这项综合研究中，我们利用第一原理计算，通过巧妙地将非范德华（non-vdW）磁性 FeTiO3 单层与铁电（FE）Ga2O3 相结合，揭示了多铁素体异质结构（HS）中的稳健磁电耦合。与传统的范德华（vdW）多铁电性 HS 不同，通过扭转 Ga2O3 单层的极化，FeTiO3 单层的磁性状态可以在铁磁（FM）和反铁磁（AFM）构型之间有效切换。这一有趣的现象源于极化相关的大量层间电子转移以及铁原子的超交换和直接交换磁耦合之间的相互作用。载流子介导的界面相互作用引起了费米级位置的关键移动，决定性地赋予了复合系统费米级附近独特的电子特性。这些新发现为未来的磁电技术提供了令人振奋的前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.