Observation of the topological surface state in the nonsymmorphic topological insulator KHgSb
Liang, A. J.1; Jiang, J.1,2,3; Wang, M. X.1; Sun, Y.4; Kumar, N.4; Shekhar, C.4; Chen, C.5; Peng, H.5; Wang, C. W.6; Xu, X.2,7,8
2017-10-25
发表期刊PHYSICAL REVIEW B
ISSN2469-9950
卷号96期号:16
发表状态已发表
DOI10.1103/PhysRevB.96.165143
摘要Topological insulators represent unusual topological quantum states, typically with gapped bulk band structure but gapless surface Dirac fermions protected by time-reversal symmetry. Recently, a distinct kind of topological insulator resulting from nonsymmorphic crystalline symmetry was proposed in the KHgX (X = As, Sb, Bi) compounds. Unlike regular topological crystalline insulators, the nonsymmorphic glide-reflection symmetry in KHgX guarantees the appearance of an exotic surface fermion with hourglass shape dispersion (where two pairs of branches switch their partners) residing on its (010) side surface, contrasting to the usual two-dimensional Dirac fermion form. Here, by using high-resolution angle-resolved photoemission spectroscopy, we systematically investigate the electronic structures of KHgSb on both (001) and (010) surfaces and reveal the unique in-gap surface states on the (010) surface with delicate dispersion consistent with the "hourglass Fermion" recently proposed. Our experiment strongly supports that KHgSb is a nonsymmorphic topological crystalline insulator with hourglass fermions, which serves as an important step to the discovery of unique topological quantum materials and exotic fermions protected by nonsymmorphic crystalline symmetry.
收录类别SCI
语种英语
资助项目U.S. DOE, Office of Basic Energy Sciences[DE-AC02-05CH11231]
WOS研究方向Materials Science ; Physics
WOS类目Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号WOS:000413700500003
出版者AMER PHYSICAL SOC
WOS关键词EXPERIMENTAL REALIZATION ; CRYSTALLINE INSULATOR ; MAJORANA FERMIONS ; DIRAC SEMIMETAL ; ARCS ; DISCOVERY ; PHASE
原始文献类型Article
引用统计
文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/9934
专题生命科学与技术学院_硕士生
物质科学与技术学院_PI研究组_柳仲楷组
大科学中心_PI研究组_刘志组
物质科学与技术学院_特聘教授组_陈宇林
物质科学与技术学院_硕士生
物质科学与技术学院_博士生
通讯作者Liu, Z. K.
作者单位1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
2.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA
3.POSTECH, Pohang Accelerator Lab, Pohang 790784, South Korea
4.Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany
5.Univ Oxford, Dept Phys, Oxford OX1 3PU, England
6.Chinese Acad Sci, SIMIT, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China
7.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
8.Tsinghua Univ, Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China
9.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
10.Collaborat Innovat Ctr Quantum Matter, Beijing 100190, Peoples R China
第一作者单位物质科学与技术学院
通讯作者单位物质科学与技术学院
第一作者的第一单位物质科学与技术学院
推荐引用方式
GB/T 7714
Liang, A. J.,Jiang, J.,Wang, M. X.,et al. Observation of the topological surface state in the nonsymmorphic topological insulator KHgSb[J]. PHYSICAL REVIEW B,2017,96(16).
APA Liang, A. J..,Jiang, J..,Wang, M. X..,Sun, Y..,Kumar, N..,...&Chen, Y. L..(2017).Observation of the topological surface state in the nonsymmorphic topological insulator KHgSb.PHYSICAL REVIEW B,96(16).
MLA Liang, A. J.,et al."Observation of the topological surface state in the nonsymmorphic topological insulator KHgSb".PHYSICAL REVIEW B 96.16(2017).
条目包含的文件 下载所有文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
个性服务
查看访问统计
谷歌学术
谷歌学术中相似的文章
[Liang, A. J.]的文章
[Jiang, J.]的文章
[Wang, M. X.]的文章
百度学术
百度学术中相似的文章
[Liang, A. J.]的文章
[Jiang, J.]的文章
[Wang, M. X.]的文章
必应学术
必应学术中相似的文章
[Liang, A. J.]的文章
[Jiang, J.]的文章
[Wang, M. X.]的文章
相关权益政策
暂无数据
收藏/分享
文件名: PhysRevB.96.165143.pdf
格式: Adobe PDF
此文件暂不支持浏览
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。