单层氯化铬/石墨烯异质结构中与扭角相关的伪磁场。

IF 12.2 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Materials Horizons Pub Date : 2024-10-30 DOI:10.1039/d4mh00726c
Zhengbo Cheng, Nanshu Liu, Jinghao Deng, Hui Zhang, Zemin Pan, Chao Zhu, Shuangzan Lu, Yusong Bai, Xiaoyu Lin, Wei Ji, Chendong Zhang
{"title":"单层氯化铬/石墨烯异质结构中与扭角相关的伪磁场。","authors":"Zhengbo Cheng, Nanshu Liu, Jinghao Deng, Hui Zhang, Zemin Pan, Chao Zhu, Shuangzan Lu, Yusong Bai, Xiaoyu Lin, Wei Ji, Chendong Zhang","doi":"10.1039/d4mh00726c","DOIUrl":null,"url":null,"abstract":"<p><p>The generation of pseudo-magnetic fields in strained graphene leads to quantized Landau levels in the absence of an external magnetic field, providing the potential to achieve a zero-magnetic-field analogue of the quantum Hall effect. Here, we report the realization of a pseudo-magnetic field in epitaxial graphene by building a monolayer CrCl<sub>2</sub>/graphene heterointerface. The CrCl<sub>2</sub> crystal structure exhibits spontaneous breaking of three-fold rotational symmetry, yielding an anisotropic displacement field at the interface. Using scanning tunneling spectroscopy, we have discovered a sequence of pseudo-Landau levels associated with massless Dirac fermions. A control experiment performed on the CrCl<sub>2</sub>/NbSe<sub>2</sub> interface confirms the origin as the pseudo-magnetic field in the graphene layer that strongly interacts with CrCl<sub>2</sub>. More interestingly, the strength of the pseudo-magnetic fields can be tuned by the twist angle between the monolayer CrCl<sub>2</sub> and graphene, with a variation of up to threefold, depending on the twist angle of 0° to 30°. This work presents a rare 2D heterojunction for exploring PMF-related physics, such as the valley Hall effect, with the advantage of easy and flexible implementation.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Twist-angle dependent pseudo-magnetic fields in monolayer CrCl<sub>2</sub>/graphene heterostructures.\",\"authors\":\"Zhengbo Cheng, Nanshu Liu, Jinghao Deng, Hui Zhang, Zemin Pan, Chao Zhu, Shuangzan Lu, Yusong Bai, Xiaoyu Lin, Wei Ji, Chendong Zhang\",\"doi\":\"10.1039/d4mh00726c\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The generation of pseudo-magnetic fields in strained graphene leads to quantized Landau levels in the absence of an external magnetic field, providing the potential to achieve a zero-magnetic-field analogue of the quantum Hall effect. Here, we report the realization of a pseudo-magnetic field in epitaxial graphene by building a monolayer CrCl<sub>2</sub>/graphene heterointerface. The CrCl<sub>2</sub> crystal structure exhibits spontaneous breaking of three-fold rotational symmetry, yielding an anisotropic displacement field at the interface. Using scanning tunneling spectroscopy, we have discovered a sequence of pseudo-Landau levels associated with massless Dirac fermions. A control experiment performed on the CrCl<sub>2</sub>/NbSe<sub>2</sub> interface confirms the origin as the pseudo-magnetic field in the graphene layer that strongly interacts with CrCl<sub>2</sub>. More interestingly, the strength of the pseudo-magnetic fields can be tuned by the twist angle between the monolayer CrCl<sub>2</sub> and graphene, with a variation of up to threefold, depending on the twist angle of 0° to 30°. This work presents a rare 2D heterojunction for exploring PMF-related physics, such as the valley Hall effect, with the advantage of easy and flexible implementation.</p>\",\"PeriodicalId\":87,\"journal\":{\"name\":\"Materials Horizons\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":12.2000,\"publicationDate\":\"2024-10-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Horizons\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1039/d4mh00726c\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Horizons","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d4mh00726c","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

在应变石墨烯中产生伪磁场会导致在没有外部磁场的情况下产生量子化朗道水平,从而为实现量子霍尔效应的零磁场类似物提供了可能。在这里,我们报告了通过构建单层氯化铬/石墨烯异质界面在外延石墨烯中实现伪磁场的情况。CrCl2 晶体结构自发破坏了三重旋转对称性,从而在界面上产生了各向异性的位移场。利用扫描隧道光谱,我们发现了一系列与无质量狄拉克费米子相关的伪兰道水平。在 CrCl2/NbSe2 界面上进行的对照实验证实了其起源是石墨烯层中与 CrCl2 强烈相互作用的伪磁场。更有趣的是,伪磁场的强度可以通过单层氯化铬和石墨烯之间的扭转角来调整,根据 0° 至 30° 扭转角的不同,变化可达三倍。这项研究提出了一种罕见的二维异质结,用于探索与 PMF 相关的物理现象,如山谷霍尔效应,其优点是易于灵活实现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Twist-angle dependent pseudo-magnetic fields in monolayer CrCl2/graphene heterostructures.

The generation of pseudo-magnetic fields in strained graphene leads to quantized Landau levels in the absence of an external magnetic field, providing the potential to achieve a zero-magnetic-field analogue of the quantum Hall effect. Here, we report the realization of a pseudo-magnetic field in epitaxial graphene by building a monolayer CrCl2/graphene heterointerface. The CrCl2 crystal structure exhibits spontaneous breaking of three-fold rotational symmetry, yielding an anisotropic displacement field at the interface. Using scanning tunneling spectroscopy, we have discovered a sequence of pseudo-Landau levels associated with massless Dirac fermions. A control experiment performed on the CrCl2/NbSe2 interface confirms the origin as the pseudo-magnetic field in the graphene layer that strongly interacts with CrCl2. More interestingly, the strength of the pseudo-magnetic fields can be tuned by the twist angle between the monolayer CrCl2 and graphene, with a variation of up to threefold, depending on the twist angle of 0° to 30°. This work presents a rare 2D heterojunction for exploring PMF-related physics, such as the valley Hall effect, with the advantage of easy and flexible implementation.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Materials Horizons
Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
18.90
自引率
2.30%
发文量
306
审稿时长
1.3 months
期刊介绍: Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.
期刊最新文献
Outstanding high-temperature capacitive performance in all-organic dielectrics enabled by synergistic optimization of molecular traps and aggregation structures. Piezo-to-piezo (P2P) conversion: simultaneous β-phase crystallization and poling of ultrathin, transparent and freestanding homopolymer PVDF films via MHz-order nanoelectromechanical vibration. Using a stable radical as an "electron donor" to develop a radical photosensitizer for efficient type-I photodynamic therapy. Biological metasurfaces based on tailored Luria Bertani Agar growth medium formulations for photonic applications. Hydrogen sulfide-generating semiconducting polymer nanoparticles for amplified radiodynamic-ferroptosis therapy of orthotopic glioblastoma.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1