Strain-induced ferromagnetism and magneto-electric coupling in two-dimensional ferroelectric ZnIn2S4

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-05-07 DOI:10.1063/5.0188388

Dong Li, Yuehua Huangfu, Guangbiao Zhang, Chang Liu, Fengzhu Ren, Bing Wang

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引用次数: 0

Abstract

Two-dimensional (2D) multiferroic materials are currently in high demand due to their significant potential for applications in the field of high-density data storage devices. However, due to the different requirements for generating ferroelectricity and magnetism, 2D multiferroic materials are rare. In this study, we propose that applying strain can induce magnetism in 2D ferroelectric materials with special electronic structures, thereby creating 2D multiferroics. Taking 2D ZnIn2S4 as an example, it shows robust ferroelectricity with an appropriate switching barrier (79.3 meV), and the out-of-plane ferroelectric polarization is 0.0322 C/m2. Applying biaxial tensile strain can change the energy of the flatband near the Fermi level, ultimately resulting in self-doping phenomena and leading to Stoner-type itinerant ferromagnetism. The reversal of ferroelectric polarization in ZnIn2S4 bilayer and ZnIn2S4–In2Se3 heterostructure can manipulate the magnetic moment of the system, exhibiting significant magnetoelectric coupling phenomena. Our findings provide a pathway for designing 2D ferromagnetic and multiferroic materials.

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二维铁电 ZnIn2S4 中的应变诱导铁磁性和磁电耦合

二维多铁氧体材料在高密度数据存储设备领域的应用潜力巨大，因此目前需求量很大。然而，由于产生铁电性和磁性的要求不同，二维多铁性材料非常罕见。在本研究中，我们提出施加应变可以诱导具有特殊电子结构的二维铁电材料产生磁性，从而创造出二维多铁电体。以二维 ZnIn2S4 为例，它显示出具有适当开关势垒（79.3 meV）的稳健铁电性，平面外铁电极化为 0.0322 C/m2。施加双轴拉伸应变可改变费米级附近平带的能量，最终产生自掺杂现象，并导致斯托纳型巡回铁磁性。ZnIn2S4 双电层和 ZnIn2S4-In2Se3 异质结构中铁电极化的反转可以操纵系统的磁矩，表现出显著的磁电耦合现象。我们的发现为设计二维铁磁性和多铁性材料提供了一条途径。

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

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.