Stacking-dependent tunable valley splitting in Janus SMoSiN2-based van der Waals heterostructure

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED Applied Physics Letters Pub Date : 2025-02-12 DOI:10.1063/5.0250449

Hui Zeng, Weijie Zhang, Chengyu Qiu, Jun Zhao, Dazhi Ding

{"title":"Stacking-dependent tunable valley splitting in Janus SMoSiN2-based van der Waals heterostructure","authors":"Hui Zeng, Weijie Zhang, Chengyu Qiu, Jun Zhao, Dazhi Ding","doi":"10.1063/5.0250449","DOIUrl":null,"url":null,"abstract":"Using the first principles calculation, we explore the modulation of valley-related properties of two-dimensional (2D) Janus SMoSiN2 monolayer by constructing van der Waals (vdW) heterostructure with the ferromagnet CrCl3 monolayer. The monolayered SMoSiN2 possesses excellent stability and direct bandgap at the K/K′ valley, making it a promising candidate for valleytronic semiconductor. The ferromagnet CrCl3 substrate induces a sizable valley splitting via proximity coupling. The valley-contrasting property of the top-stacking is significantly tunable by both in-plane sliding and vertical strain engineering, leading to extraordinary tunability of valley splitting in the range 1.6–9.4 meV. In contrast, the valley-contrasting property of the bottom-stacking is comparably robust due to the screen effect originating from the outmost N sublayer to reduce the proximity interaction. Our investigation reveals that the stacking order is a degree of freedom to manipulate the valley-related properties of various vdW heterostructures, facilitating the achievement of versatile valley-contrasting properties.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":"6 1","pages":""},"PeriodicalIF":3.5000,"publicationDate":"2025-02-12","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/10.1063/5.0250449","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}

引用次数: 0

Abstract

Using the first principles calculation, we explore the modulation of valley-related properties of two-dimensional (2D) Janus SMoSiN2 monolayer by constructing van der Waals (vdW) heterostructure with the ferromagnet CrCl3 monolayer. The monolayered SMoSiN2 possesses excellent stability and direct bandgap at the K/K′ valley, making it a promising candidate for valleytronic semiconductor. The ferromagnet CrCl3 substrate induces a sizable valley splitting via proximity coupling. The valley-contrasting property of the top-stacking is significantly tunable by both in-plane sliding and vertical strain engineering, leading to extraordinary tunability of valley splitting in the range 1.6–9.4 meV. In contrast, the valley-contrasting property of the bottom-stacking is comparably robust due to the screen effect originating from the outmost N sublayer to reduce the proximity interaction. Our investigation reveals that the stacking order is a degree of freedom to manipulate the valley-related properties of various vdW heterostructures, facilitating the achievement of versatile valley-contrasting properties.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

求助全文

约1分钟内获得全文去求助

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.