Orbitronic terahertz emission from Mo-based nanolayers via the inverse orbital Hall and Rashba–Edelstein effects

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-10-14 DOI:10.1063/5.0294721

Basem Y. Shahriar, Abdulhakem Y. Elezzabi

引用次数: 0

Abstract

Rapid advancements in the communications and semiconductor industries have brought about the need to move to higher operating frequencies, with the terahertz (THz) frequency band being prospected as the next frontier for wireless communications and data transfer. Recent work has established that it is possible to harness orbital currents to generate THz radiation from metallic heterostructures comprised of ferromagnetic and transition metals. We demonstrate THz emission from Co/Mo/SiO2 and Co/Au/Mo/SiO2 orbitronic THz emitters (OTEs) via the inverse orbital Hall effect and the inverse orbital Rashba–Edelstein effect and measure the velocity of orbital carriers in Mo. Given the interplay between the various spin and orbital effects in OTEs that allow for interconversions between spin and orbital torque simply by the introduction of nm-thick metallic films, such devices hold significant potential in paving the way for the steady march away from conventional charge-based electronics in the decades to come.

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基于反轨道Hall和Rashba-Edelstein效应的mo基纳米层的轨道太赫兹发射

通信和半导体行业的快速发展带来了对更高工作频率的需求，太赫兹（THz）频段被认为是无线通信和数据传输的下一个前沿。最近的工作已经证实，利用轨道电流从由铁磁性和过渡金属组成的金属异质结构中产生太赫兹辐射是可能的。我们通过反轨道霍尔效应和反轨道Rashba-Edelstein效应证明了Co/Mo/SiO2和Co/Au/Mo/SiO2轨道太赫兹发射器（OTEs）的太赫兹发射，并测量了Mo中轨道载流子的速度。考虑到OTEs中各种自旋和轨道效应之间的相互作用，只要引入纳米厚的金属薄膜，就可以实现自旋和轨道扭矩之间的相互转换，这类设备具有巨大的潜力，为未来几十年稳步摆脱传统的基于电荷的电子设备铺平道路。

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

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.