Suppressed Nonreciprocal Second-Harmonic Generation of Antiferromagnet MnPSe3 in the MnPSe3/Graphene Heterostructure Due to Interfacial Magnon–Plasmon Coupling

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-11-13 DOI:10.1021/acs.nanolett.4c04184

Ziyun Wang, Yuqiang Liu, De Hou, Xintong Hu, Xiao Chang, Linhua Hu, Jinsheng Xu, Ningfang Wang, Bolin Li, Xiaoping Yang, Zhigao Sheng

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Abstract

Interfacial coupling is one of the keys to manipulating magnetic/nonmagnetic two-dimensional (2D) heterostructures for novel functionalities. The MnPSe₃/graphene heterostructure is a prospective platform for quantum information and metrology. However, how graphene affects MnPSe₃ through interfacial coupling is still poorly understood. Herein, second-harmonic generation (SHG) of antiferromagnet MnPSe₃ in the MnPSe₃/graphene heterostructure is revealed. Surprisingly, it was found that below T_N, nonreciprocal or c-type SHG of MnPSe₃ disappeared when interfacing with the graphene, suggesting the existence of interfacial couplings and/or interactions. Most interestingly, different from the short-range interfacial proximity interaction, this interfacial interaction could be contactless and long-range and varied from 2D metallic/semiconducting to insulating underlayers. Interfacial magnon–plasmon coupling probably played an important role in suppressing the c-type SHG signals of MnPSe₃ in the MnPSe₃/graphene heterostructure. This study will improve our understanding of the manipulation of nonlinear optical properties in 2D heterostructures.

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MnPSe3/Graphene 异质结构中反铁磁体 MnPSe3 的非互惠二次谐波生成因界面磁子-普拉斯门耦合而受到抑制

界面耦合是利用磁性/非磁性二维（2D）异质结构实现新功能的关键之一。MnPSe3/ 石墨烯异质结构是量子信息和计量学的前瞻性平台。然而，人们对石墨烯如何通过界面耦合影响 MnPSe3 仍知之甚少。本文揭示了 MnPSe3/ 石墨烯异质结构中反铁磁体 MnPSe3 的二次谐波发生（SHG）。令人惊讶的是，研究发现当 MnPSe3 与石墨烯交界面时，低于 TN 的非互易或 c 型 SHG 消失了，这表明存在界面耦合和/或相互作用。最有趣的是，与短程界面邻近相互作用不同，这种界面相互作用可能是非接触式的长程相互作用，并且从二维金属/半导到绝缘底层都有不同。界面磁子-等离子体耦合可能在抑制 MnPSe3/ 石墨烯异质结构中 MnPSe3 的 c 型 SHG 信号方面发挥了重要作用。这项研究将加深我们对二维异质结构中非线性光学特性的理解。

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

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.