Realizing Abundant Two-Dimensional Altermagnets with Anisotropic Spin Current Via Spatial Inversion Symmetry Breaking.

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-05-27 DOI:10.1021/acs.nanolett.5c00198

Chao Liu,Xiangyang Li,Xingxing Li,Jinlong Yang

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引用次数: 0

Abstract

Altermagnets exhibit nonrelativistic spin splitting with net-zero magnetic moments, making them advantageous for spintronic devices with miniaturized size and high integration. Developing general methods to design altermagnets, particularly in a low dimension, is highly desirable. Here, we propose that breaking the spatial inversion symmetry of crystals can produce altermagnetism in antiferromagnetic monolayers. By applying Janus structurization to two-dimensional (2D) FeSe-type monolayers, 41 polar altermagnets were successfully identified through first-principles calculations, confirming the feasibility of our proposed approach. Furthermore, via systematic screening, we obtained 29 altermagnets with significant spin splitting (>0.5 eV) and high Néel temperatures (above liquid nitrogen temperature). Moreover, using 2D Mn2PSe as an example, we revealed the mechanism of how polarity drives the transformation of antiferromagnets into altermagnets and demonstrated its anisotropic spin current generation and notable spin Hall effect. This work paves a way for realizing high-performance and multifunctional nanoaltermagnets.

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利用空间反演对称破缺实现具有各向异性自旋电流的丰富二维交替磁体。

交替磁体表现出非相对论性的自旋分裂和净磁矩为零，使其有利于自旋电子器件的小型化和高集成度。开发通用的方法来设计替代磁体，特别是在低维度，是非常可取的。在这里，我们提出打破晶体的空间反演对称性可以在反铁磁单层中产生变磁。通过将Janus结构应用于二维（2D） fese型单层，通过第一性原理计算成功识别了41个极性交替磁体，证实了我们提出的方法的可行性。此外，通过系统筛选，我们获得了29个具有明显自旋分裂（>0.5 eV）和高nsamel温度（高于液氮温度）的交替磁体。此外，以二维Mn2PSe为例，揭示了极性驱动反铁磁体向互变磁体转变的机制，并证明了其各向异性自旋电流的产生和显著的自旋霍尔效应。这项工作为实现高性能和多功能纳米交替磁体铺平了道路。

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.