Observation of Unconventional Quantum Spin Textures in Topological Insulators

IF 44.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Science Pub Date : 2009-02-13 DOI:10.1126/science.1167733
D. Hsieh, Y. Xia, L. Wray, D. Qian, A. Pal, J. H. Dil, J. Osterwalder, F. Meier, G. Bihlmayer, C. L. Kane, Y. S. Hor, R. J. Cava, M. Z. Hasan
{"title":"Observation of Unconventional Quantum Spin Textures in Topological Insulators","authors":"D. Hsieh,&nbsp;Y. Xia,&nbsp;L. Wray,&nbsp;D. Qian,&nbsp;A. Pal,&nbsp;J. H. Dil,&nbsp;J. Osterwalder,&nbsp;F. Meier,&nbsp;G. Bihlmayer,&nbsp;C. L. Kane,&nbsp;Y. S. Hor,&nbsp;R. J. Cava,&nbsp;M. Z. Hasan","doi":"10.1126/science.1167733","DOIUrl":null,"url":null,"abstract":"<div >A topologically ordered material is characterized by a rare quantum organization of electrons that evades the conventional spontaneously broken symmetry–based classification of condensed matter. Exotic spin-transport phenomena, such as the dissipationless quantum spin Hall effect, have been speculated to originate from a topological order whose identification requires a spin-sensitive measurement, which does not exist to this date in any system. Using Mott polarimetry, we probed the spin degrees of freedom and demonstrated that topological quantum numbers are completely determined from spin texture–imaging measurements. Applying this method to Sb and Bi<sub>1–x</sub>Sb<sub>x</sub>, we identified the origin of its topological order and unusual chiral properties. These results taken together constitute the first observation of surface electrons collectively carrying a topological quantum Berry''s phase and definite spin chirality, which are the key electronic properties component for realizing topological quantum computing bits with intrinsic spin Hall–like topological phenomena.</div>","PeriodicalId":21678,"journal":{"name":"Science","volume":"323 5916","pages":""},"PeriodicalIF":44.7000,"publicationDate":"2009-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1126/science.1167733","citationCount":"705","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science","FirstCategoryId":"103","ListUrlMain":"https://www.science.org/doi/10.1126/science.1167733","RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
引用次数: 705

Abstract

A topologically ordered material is characterized by a rare quantum organization of electrons that evades the conventional spontaneously broken symmetry–based classification of condensed matter. Exotic spin-transport phenomena, such as the dissipationless quantum spin Hall effect, have been speculated to originate from a topological order whose identification requires a spin-sensitive measurement, which does not exist to this date in any system. Using Mott polarimetry, we probed the spin degrees of freedom and demonstrated that topological quantum numbers are completely determined from spin texture–imaging measurements. Applying this method to Sb and Bi1–xSbx, we identified the origin of its topological order and unusual chiral properties. These results taken together constitute the first observation of surface electrons collectively carrying a topological quantum Berry''s phase and definite spin chirality, which are the key electronic properties component for realizing topological quantum computing bits with intrinsic spin Hall–like topological phenomena.
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
观察拓扑绝缘体中的非常规量子自旋纹理
拓扑有序材料的特点是具有罕见的电子量子组织,避开了凝聚态物质传统的自发破缺对称分类。人们推测,无耗散量子自旋霍尔效应等奇异的自旋传输现象源于拓扑有序,要识别拓扑有序需要进行自旋敏感测量,而迄今为止,任何系统都不存在这种测量方法。我们利用莫特极坐标法探测了自旋自由度,并证明拓扑量子数完全可以通过自旋纹理成像测量来确定。将这种方法应用于锑和 Bi1-xSbx,我们确定了其拓扑秩序和不寻常手性的起源。这些结果共同构成了对表面电子集体携带拓扑量子贝里相和确定自旋手性的首次观测,而这正是实现具有内在自旋霍尔拓扑现象的拓扑量子计算比特的关键电子特性组成部分。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Science
Science 综合性期刊-综合性期刊
CiteScore
61.10
自引率
0.90%
发文量
0
审稿时长
2.1 months
期刊介绍: Science is a leading outlet for scientific news, commentary, and cutting-edge research. Through its print and online incarnations, Science reaches an estimated worldwide readership of more than one million. Science’s authorship is global too, and its articles consistently rank among the world's most cited research. Science serves as a forum for discussion of important issues related to the advancement of science by publishing material on which a consensus has been reached as well as including the presentation of minority or conflicting points of view. Accordingly, all articles published in Science—including editorials, news and comment, and book reviews—are signed and reflect the individual views of the authors and not official points of view adopted by AAAS or the institutions with which the authors are affiliated. Science seeks to publish those papers that are most influential in their fields or across fields and that will significantly advance scientific understanding. Selected papers should present novel and broadly important data, syntheses, or concepts. They should merit recognition by the wider scientific community and general public provided by publication in Science, beyond that provided by specialty journals. Science welcomes submissions from all fields of science and from any source. The editors are committed to the prompt evaluation and publication of submitted papers while upholding high standards that support reproducibility of published research. Science is published weekly; selected papers are published online ahead of print.
期刊最新文献
Isotopic and compositional constraints on the source of basalt collected from the lunar farside. Regulatory T cells constrain T cells of shared specificity to enforce tolerance during infection. Is flat 15% fair? A deep dive into oxygen sensing. Apoplastic barriers are essential for nodule formation and nitrogen fixation in Lotus japonicus.
×
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