扭曲双层MnPSe3中的八极涡旋晶体和环面力矩

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-01-27 DOI:10.1021/acs.nanolett.4c05729

Muhammad Akram, Fan Yang, Turan Birol, Onur Erten

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引用次数: 0

摘要

二维材料中反铁磁有序的实验检测是一项具有挑战性的任务。通过目前的技术识别多域反铁磁结构更加困难。因此，我们研究了扭曲双层MnPSe3的高阶多极矩。MnPSe3的单分子层呈现反铁磁有序，而moir超晶格呈现双畴相。我们发现M33+和M33 -的八极矩在这个多畴相中是显著的。此外，当[M33+，M33 -]由矢量的x和y分量表示时，这些八极矩的合成模式形成涡流晶体，从而产生八极环面矩，Txyz和Tzβ。Txyz和Tzβ可以产生磁电效应和陀螺双折射，可以提供间接检测多域反铁磁有序的方法。我们的研究结果强调了高阶多极矩对识别莫尔维尔磁体中复杂自旋织构的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Octupolar Vortex Crystal and Toroidal Moment in Twisted Bilayer MnPSe3

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Octupolar Vortex Crystal and Toroidal Moment in Twisted Bilayer MnPSe3

Experimental detection of antiferromagnetic order in two-dimensional materials is a challenging task. Identifying multidomain antiferromagnetic textures via the current techniques is even more difficult. Therefore, we investigate the higher-order multipole moments in twisted bilayer MnPSe₃. While the monolayers of MnPSe₃ exhibit antiferromagnetic order, the moiré superlattices display a two-domain phase. We show that the octupolar moments M₃₃⁺ and M₃₃^– are significant in this multidomain phase. In addition, when [M₃₃⁺,M₃₃^–] are represented by the x and y components of a vector, the resultant pattern of these octupole moments forms vortex crystals which leads to octupolar toroidal moments, T_xyz and T_z^β. T_xyz and T_z^β can give rise to a magnetoelectric effect and gyrotropic birefringence that may provide indirect ways of detecting multidomain antiferromagnetic order. Our results highlight the importance of higher-order multipole moments for identification of complex spin textures in moiré magnets.

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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.