拓扑半金属的角分辨光电子能谱研究  

Angle-resolved photoemission spectroscopy studies of topological semimetals

作　　者：高顺业 钱天[1,4] 杨乐仙 柳仲楷 陈宇林 GAO ShunYe;QIAN Tian;YANG LeXian;LIU ZhongKai;CHEN YuLin(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Photon Science Division,Paul Scherrer Institut,Villigen CH-5232,Switzerland;Songshan Lake Materials Laboratory,Dongguan 523808,China;Department of Physics,Tsinghua University,Beijing 100084,China;ShanghaiTech Laboratory for Topological Physics,School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;Department of Physics,University of Oxford,Oxford OX13PU,UK)

机构地区：[1]中国科学院物理研究所,北京凝聚态物理国家研究中心,北京100190 [2]中国科学院大学,北京100049 [3]保罗谢勒研究所光子科学部,瑞士菲利根CH-5232 [4]松山湖材料实验室,东莞523808 [5]清华大学物理系,北京100084 [6]上海科技大学物质科学与技术学院,拓扑物理实验室,上海201210 [7]牛津大学物理系,英国牛津OX13PU

出　　处：《中国科学：物理学、力学、天文学》2023年第6期93-114,共22页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家重点研发计划(编号:2022YFA1403803);国家自然科学基金(编号:U1832202);中国科学院(编号:QYZDB-SSW-SLH023,XDB33000000);国家留学基金委(编号:202104910090);中瑞青年学者交流项目(编号:CN-EG-03-012021)资助。

摘　　要：拓扑半金属是一类新奇的量子材料,它存在受拓扑保护的无能隙体态能带交叉和特征表面态.根据能带交叉的维度和简并度,拓扑半金属可以简单分为:零维的四重简并狄拉克半金属、二重简并外尔半金属、三重/六重/八重简并点半金属,和高维度的节线/节面半金属.近十年来,基于角分辨光电子能谱(ARPES)实验技术,人们可以直接测量拓扑半金属中的体态能带简并和特征表面态,清楚地揭示材料的拓扑本质.本文系统性回顾了使用ARPES研究各种类拓扑半金属的成果与进展,有助于理解其物理性质、拓扑起源以及探索更多新奇拓扑半金属.Topological semimetals(TSMs)are a class of novel quantum materials with gapless bulk band crossings and characteristic surface states protected by nontrivial topology.Based on the dimension and degeneracy of band crossings,TSMs can be divided into zero-dimensional four-folding degenerate Dirac,two-folding degenerate Weyl,three-/six-/eight-folding degenerate,and high-dimensional nodal-line/surface semimetals.In the past decade,researchers have measured the bulk band crossings and characteristic surface states of TSMs through angle-resolved photoemission spectroscopy(ARPES)to clearly reveal the topological nature of these TSMs.In this article,we systematically review the achievements and advances of ARPES studies of TSMs.This review will help us understand the physical properties and topological origins and facilitate the exploration of more novel TSMs.

关 键 词：拓扑半金属 角分辨光电子能谱 电子结构 能带简并 费米弧 

分 类 号：O469[理学—凝聚态物理] TB30[理学—电子物理学]