CoFeB/Cr/重金属结构反轨道霍尔效应的实验验证

IF 3.6 2区 物理与天体物理 Q2 PHYSICS, APPLIED
S. Obinata, H. Masumoto, T. Kimura
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引用次数: 0

摘要

自旋电流,即自旋角动量的流动,是自旋电子学和基于自旋的能量转换的基础。然而,其有限的传播长度和较低的发电效率阻碍了进一步的技术进步。作为一种替代方案,由电子轨道角动量产生的轨道电流显示出相当大的前景,特别是在具有大轨道霍尔电导率的金属中。此外,轻金属中的轨道电流可以比自旋电流传播得更远,这强调了它在下一代自旋轨道电子器件中的潜力。尽管有这些前景,轨道电流的直接实验验证仍然难以捉摸。在这里,我们报告了通过在CoFeB/Cr/(Pt, Ta, W)多层结构上进行动态自旋注入实验来检测轨道电荷转换的电检测,即逆轨道霍尔效应(IOHE)。我们的结果提供了对IOHE的直接观测,为先进的自旋轨道应用铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental verification of inverse orbital Hall effect using CoFeB/Cr/heavy metal structures
Spin current, the flow of spin angular momentum, is fundamental to spintronics and spin-based energy conversion. However, its limited propagation length and low generation efficiency hinder further technological progress. As an alternative, orbital current—arising from electron orbital angular momentum—shows considerable promise, especially in metals with large orbital Hall conductivity. Moreover, orbital current in light metals can travel farther than spin current, underscoring its potential for next-generation spin-orbitronic devices. Despite these prospects, direct experimental verification of orbital currents has remained elusive. Here, we report the electrical detection of orbital-charge conversion, known as the inverse orbital Hall effect (IOHE), by performing dynamical spin injection experiments on CoFeB/Cr/(Pt, Ta, W) multilayer structures. Our results provide a direct observation of IOHE, paving the way for advanced spin-orbitronic applications.
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来源期刊
Applied Physics Letters
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.
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