Proximity-induced antisymmetric humps in Hall resistivity in Fe-doped monolayer WSe2

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-03-10 DOI:10.1063/5.0250741

Mengqi Fang, Chunli Tang, Siwei Chen, Zitao Tang, Min-Yeong Choi, Jae Hyuck Jang, Hee-Suk Chung, Maya Narayanan Nair, Wencan Jin, Eui-Hyeok Yang

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引用次数: 0

Abstract

Non-collinear spin texture has attracted great attention since it provides an important probe of the interaction between electron and topological spin textures. While it has been widely reported in chiral magnets, oxide heterostructures, and hybrid systems such as ferromagnet/heavy metal and ferromagnet/topological insulators, the study of non-collinear spin texture in two-dimensional (2D) van der Waals (vdW) dilute magnetic semiconductor (DMS) monolayers is relatively lacking, hindering the understanding at the atomically thin scale. Here, we probe the temperature-dependent antisymmetric humps in Hall resistivity by utilizing the proximity coupling of Fe-doped monolayer WSe2 (Fe:WSe2) synthesized using chemical vapor deposition on a Pt Hall bar. Multiple characterization methods were employed to demonstrate that Fe atoms substitutionally replace W atoms, making a 2D vdW DMS at room temperature. Distinct from the intrinsic anomalous Hall effect, we found the transverse Hall resistivity of Fe:WSe2 displaying two additional antisymmetric peak features in the temperature-dependent measurements. These peaks are attributed to the magnetic features at the Fe:WSe2 and Pt interface. Our work shows that a DMS synthesized from 2D vdW transition metal dichalcogenides is promising for realizing magnetic and spintronic applications.

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非共线自旋纹理为电子和拓扑自旋纹理之间的相互作用提供了一个重要的探针，因此备受关注。虽然手性磁体、氧化物异质结构以及铁磁体/重金属和铁磁体/拓扑绝缘体等混合系统中的非共线自旋纹理已被广泛报道，但二维范德华（vdW）稀磁半导体（DMS）单层中的非共线自旋纹理研究却相对缺乏，这阻碍了对原子薄尺度的理解。在这里，我们利用化学气相沉积法在铂霍尔条上合成的掺铁单层 WSe2 (Fe:WSe2)的近距离耦合，探究了霍尔电阻率随温度变化的反不对称驼峰。利用多种表征方法证明了铁原子取代了 W 原子，从而在室温下形成了二维 vdW DMS。除了固有的反常霍尔效应外，我们还发现 Fe:WSe2 的横向霍尔电阻率在随温度变化的测量中显示出两个额外的非对称峰值特征。这些峰值归因于 Fe:WSe2 和铂界面的磁性特征。我们的工作表明，由二维 vdW 过渡金属二掺杂化合物合成的 DMS 有希望实现磁性和自旋电子应用。

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.