Spin chain orientation and magneto-optical coupling in twisted NiPS3 homostructures

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-09-09 DOI:10.1063/5.0223945

Junying Chen, Xing Xie, Xinyu Oyang, Junnan Ding, Fangping Ouyang, Zongwen Liu, Jian-Tao Wang, Jun He, Yanping Liu

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引用次数: 0

Abstract

Magnetic two-dimensional (2D) materials have garnered significant attention due to their unique electronic, magnetic, and optical properties and their potential applications in next-generation electronic and optoelectronic devices. However, the magneto-optical effects of oligolayer antiferromagnetic materials remain inadequately understood. Here, we investigate the magnetic properties of few-layer nickel phosphorus trisulfide (NiPS3) and its twisted heterostructures, emphasizing the observation of optical phenomena at low temperatures (1.65 K). By stacking few-layer NiPS3 to fabricate twisted homostructures, we probe their magnetic characteristics using photoluminescence (PL) spectroscopy. Our results reveal that sharp exciton peaks emerge at low temperatures and that the spin chain orientation in oligolayer NiPS3 can be discerned through the polarization dependence of exciton PL intensity. Notably, fewer-layered NiPS3 exhibits a significant magneto-optical effect under an applied magnetic field, allowing the modulation of the polarization angle of its exciton PL spectrum. Additionally, the polarization-dependent Raman spectrum of NiPS3 shows substantial changes under the influence of a magnetic field. These findings underscore the potential of few-layer NiPS3 for future magneto-optical device applications.

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扭曲 NiPS3 同质结构中的自旋链定向和磁光耦合

磁性二维（2D）材料因其独特的电子、磁性和光学特性及其在下一代电子和光电设备中的潜在应用而备受关注。然而，人们对寡层反铁磁材料的磁光效应仍然了解不足。在此，我们研究了少层三硫化二磷镍（NiPS3）及其扭曲异质结构的磁特性，重点观察了低温（1.65 K）下的光学现象。通过堆叠几层 NiPS3 来制造扭曲的同质结构，我们使用光致发光（PL）光谱探究了它们的磁特性。我们的研究结果表明，在低温下会出现尖锐的激子峰，而且可以通过激子光致发光强度的极化依赖性来辨别寡层 NiPS3 中的自旋链取向。值得注意的是，在外加磁场的作用下，较少层数的 NiPS3 表现出显著的磁光效应，可以调节其激子聚勒光谱的偏振角。此外，在磁场的影响下，NiPS3 的偏振相关拉曼光谱也发生了很大变化。这些发现强调了少层 NiPS3 在未来磁光器件应用中的潜力。

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.

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