{"title":"CoFeB/Cr/重金属结构反轨道霍尔效应的实验验证","authors":"S. Obinata, H. Masumoto, T. Kimura","doi":"10.1063/5.0269255","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"149 1","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental verification of inverse orbital Hall effect using CoFeB/Cr/heavy metal structures\",\"authors\":\"S. Obinata, H. Masumoto, T. Kimura\",\"doi\":\"10.1063/5.0269255\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"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.\",\"PeriodicalId\":8094,\"journal\":{\"name\":\"Applied Physics Letters\",\"volume\":\"149 1\",\"pages\":\"\"},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2025-07-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Physics Letters\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1063/5.0269255\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Physics Letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1063/5.0269255","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
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.
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.