拓扑 Sb2Te3/Nb 中由空穴载流子介导的库珀配对的均匀扩散。

IF 15.8 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY ACS Nano Pub Date : 2024-11-12 Epub Date: 2024-10-29 DOI:10.1021/acsnano.4c10533
Joseph A Hlevyack, Sahand Najafzadeh, Yao Li, Tsubaki Nagashima, Akifumi Mine, Yigui Zhong, Takeshi Suzuki, Akiko Fukushima, Meng-Kai Lin, Soorya Suresh Babu, Jinwoong Hwang, Ji-Eun Lee, Sung-Kwan Mo, James N Eckstein, Shik Shin, Kozo Okazaki, Tai-Chang Chiang
{"title":"拓扑 Sb2Te3/Nb 中由空穴载流子介导的库珀配对的均匀扩散。","authors":"Joseph A Hlevyack, Sahand Najafzadeh, Yao Li, Tsubaki Nagashima, Akifumi Mine, Yigui Zhong, Takeshi Suzuki, Akiko Fukushima, Meng-Kai Lin, Soorya Suresh Babu, Jinwoong Hwang, Ji-Eun Lee, Sung-Kwan Mo, James N Eckstein, Shik Shin, Kozo Okazaki, Tai-Chang Chiang","doi":"10.1021/acsnano.4c10533","DOIUrl":null,"url":null,"abstract":"<p><p>Spin-helical Dirac Fermions at a doped topological insulator's boundaries can support Majorana quasiparticles when coupled with <i>s</i>-wave superconductors, but in <i>n</i>-doped systems, the requisite induced Cooper pairing in topological states is often buried at heterointerfaces or complicated by degenerate coupling with bulk conduction carriers. Rarely probed are <i>p</i>-doped topological structures with nondegenerate Dirac and bulk valence bands at the Fermi level, which may foster long-range superconductivity without sacrificing Majorana physics. Using ultrahigh-resolution photoemission, we report proximity pairing with a large decay length in <i>p</i>-doped topological Sb<sub>2</sub>Te<sub>3</sub> on superconducting Nb. Despite no momentum-space degeneracy, the topological and bulk states of Sb<sub>2</sub>Te<sub>3</sub>/Nb exhibit the same isotropic superconducting gaps at low temperatures. Our results unify principles for realizing accessible pairing in Dirac Fermions relevant to topological superconductivity.</p>","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":" ","pages":"31323-31331"},"PeriodicalIF":15.8000,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11562947/pdf/","citationCount":"0","resultStr":"{\"title\":\"Uniform Diffusion of Cooper Pairing Mediated by Hole Carriers in Topological Sb<sub>2</sub>Te<sub>3</sub>/Nb.\",\"authors\":\"Joseph A Hlevyack, Sahand Najafzadeh, Yao Li, Tsubaki Nagashima, Akifumi Mine, Yigui Zhong, Takeshi Suzuki, Akiko Fukushima, Meng-Kai Lin, Soorya Suresh Babu, Jinwoong Hwang, Ji-Eun Lee, Sung-Kwan Mo, James N Eckstein, Shik Shin, Kozo Okazaki, Tai-Chang Chiang\",\"doi\":\"10.1021/acsnano.4c10533\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Spin-helical Dirac Fermions at a doped topological insulator's boundaries can support Majorana quasiparticles when coupled with <i>s</i>-wave superconductors, but in <i>n</i>-doped systems, the requisite induced Cooper pairing in topological states is often buried at heterointerfaces or complicated by degenerate coupling with bulk conduction carriers. Rarely probed are <i>p</i>-doped topological structures with nondegenerate Dirac and bulk valence bands at the Fermi level, which may foster long-range superconductivity without sacrificing Majorana physics. Using ultrahigh-resolution photoemission, we report proximity pairing with a large decay length in <i>p</i>-doped topological Sb<sub>2</sub>Te<sub>3</sub> on superconducting Nb. Despite no momentum-space degeneracy, the topological and bulk states of Sb<sub>2</sub>Te<sub>3</sub>/Nb exhibit the same isotropic superconducting gaps at low temperatures. Our results unify principles for realizing accessible pairing in Dirac Fermions relevant to topological superconductivity.</p>\",\"PeriodicalId\":21,\"journal\":{\"name\":\"ACS Nano\",\"volume\":\" \",\"pages\":\"31323-31331\"},\"PeriodicalIF\":15.8000,\"publicationDate\":\"2024-11-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11562947/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Nano\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1021/acsnano.4c10533\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/10/29 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Nano","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acsnano.4c10533","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/10/29 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

掺杂拓扑绝缘体边界上的自旋螺旋狄拉克费米子在与 s 波超导体耦合时可支持马约拉纳准粒子,但在 n 掺杂系统中,拓扑态中必要的诱导库珀配对往往被埋没在异质界面上,或因与体传导载流子的退化耦合而变得复杂。在费米级具有非失能狄拉克带和体价带的 p 掺杂拓扑结构很少被探测到,这种结构可以在不牺牲马约拉纳物理的情况下促进长程超导。我们利用超高分辨率光发射技术,报告了在超导铌上的 p 掺杂拓扑 Sb2Te3 中具有大衰变长度的近距离配对。尽管没有动量-空间退化,但 Sb2Te3/Nb 的拓扑态和体态在低温下表现出相同的各向同性超导间隙。我们的研究结果统一了在狄拉克费米子中实现与拓扑超导相关的无障碍配对的原理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

摘要图片

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
Uniform Diffusion of Cooper Pairing Mediated by Hole Carriers in Topological Sb2Te3/Nb.

Spin-helical Dirac Fermions at a doped topological insulator's boundaries can support Majorana quasiparticles when coupled with s-wave superconductors, but in n-doped systems, the requisite induced Cooper pairing in topological states is often buried at heterointerfaces or complicated by degenerate coupling with bulk conduction carriers. Rarely probed are p-doped topological structures with nondegenerate Dirac and bulk valence bands at the Fermi level, which may foster long-range superconductivity without sacrificing Majorana physics. Using ultrahigh-resolution photoemission, we report proximity pairing with a large decay length in p-doped topological Sb2Te3 on superconducting Nb. Despite no momentum-space degeneracy, the topological and bulk states of Sb2Te3/Nb exhibit the same isotropic superconducting gaps at low temperatures. Our results unify principles for realizing accessible pairing in Dirac Fermions relevant to topological superconductivity.

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
ACS Nano
ACS Nano 工程技术-材料科学:综合
CiteScore
26.00
自引率
4.10%
发文量
1627
审稿时长
1.7 months
期刊介绍: ACS Nano, published monthly, serves as an international forum for comprehensive articles on nanoscience and nanotechnology research at the intersections of chemistry, biology, materials science, physics, and engineering. The journal fosters communication among scientists in these communities, facilitating collaboration, new research opportunities, and advancements through discoveries. ACS Nano covers synthesis, assembly, characterization, theory, and simulation of nanostructures, nanobiotechnology, nanofabrication, methods and tools for nanoscience and nanotechnology, and self- and directed-assembly. Alongside original research articles, it offers thorough reviews, perspectives on cutting-edge research, and discussions envisioning the future of nanoscience and nanotechnology.
期刊最新文献
Targeting Metastasis in Head and Neck Squamous Cell Carcinoma Using Follistatin mRNA Lipid Nanoparticles Photocatalytic Achmatowicz Rearrangement on Triphenylbenzene–Dimethoxyterephthaldehyde–Covalent Organic Framework-Mo for Converting Biomass-Derived Furfuryl Alcohol to Hydropyranone Distinct Inflammatory Programs Underlie the Intramuscular Lipid Nanoparticle Response Spontaneous Lifting and Self-Cleaning of Gas Hydrate Crystals Design Considerations and Fabrication Protocols of High-Performance Intrinsically Stretchable Transistors and Integrated Circuits
×
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