One-dimensional ferromagnetism revealed by Kondo effect and linear V/W-shaped anisotropic magnetoresistance

IF 10.9 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Today Pub Date : 2025-10-01 DOI:10.1016/j.nantod.2025.102908

Zheng Wei , Yu-Hao Wan , Wenxiang Wang , Jiawang You , Zhisheng Peng , Julienne Impundu , Tao He , Changzhi Gu , Hongxuan Ren , Yong Jun Li , Qing-Feng Sun , Lianfeng Sun

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引用次数: 0

Abstract

Magnetic anisotropy can remove Mermin-Wagner prohibitions for magnetic order in two-dimensional materials. An interesting and fundamental question is to explore magnetism in materials/structures with still lower dimensions. Here we show that there is one-dimensional ferromagnetism along the edges between a molybdenum (Mo) strip and a monolayer graphene (MLG). When a Mo strip is deposited across an MLG with magnetron sputtering, the MLG underneath Mo is removed due to a solid-solid reaction, making two newly-formed, one-dimensional edges between the Mo strip and the MLG. For one Mo strip on an MLG, Kondo effect and anisotropic magnetoresistance (AMR) can be observed, which exhibits a unique linear V/W-shape in small magnetic fields. For two parallel Mo strips on a single MLG, besides Kondo effect and AMR, spin Hall effect (SHE) and inverse spin Hall effect (ISHE) have been observed at temperature up to 300 K, which implies the antiferromagnetic coupling between the edges. These results indicate the coexistence of Kondo effect and one-dimensional ferromagnetism and great potential applications.

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近藤效应揭示的一维铁磁性和线性V/ w型各向异性磁阻

磁各向异性可以消除二维材料中磁序的Mermin-Wagner禁令。一个有趣而基本的问题是探索低维材料/结构中的磁性。在这里，我们展示了沿钼（Mo）带和单层石墨烯（MLG）之间的边缘存在一维铁磁性。当磁控溅射沉积Mo条在MLG上时，由于固-固反应，Mo下面的MLG被移除，在Mo条和MLG之间形成两个新形成的一维边缘。对于MLG上的Mo条带，可以观察到近藤效应和各向异性磁电阻（AMR），在小磁场下呈现出独特的线性V/ w形状。在300 K温度下，对单根MLG上的两条平行Mo条，除了近田效应和AMR外，还观察到自旋霍尔效应（SHE）和逆自旋霍尔效应（ISHE），这表明边缘之间存在反铁磁耦合。这些结果表明近藤效应与一维铁磁性共存，具有广阔的应用前景。

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 Today 工程技术-材料科学：综合

CiteScore

21.50

自引率

3.40%

发文量

305

审稿时长

40 days

期刊介绍： Nano Today is a journal dedicated to publishing influential and innovative work in the field of nanoscience and technology. It covers a wide range of subject areas including biomaterials, materials chemistry, materials science, chemistry, bioengineering, biochemistry, genetics and molecular biology, engineering, and nanotechnology. The journal considers articles that inform readers about the latest research, breakthroughs, and topical issues in these fields. It provides comprehensive coverage through a mixture of peer-reviewed articles, research news, and information on key developments. Nano Today is abstracted and indexed in Science Citation Index, Ei Compendex, Embase, Scopus, and INSPEC.