Coexistence of Dirac and Weyl points in non-centrosymmetric semimetal NbIrTe_(4)  

作　　者：刘清馨 付阳 丁鹏飞 马欢 郭朋杰 雷和畅 王善才 Qingxin Liu;Yang Fu;Pengfei Ding;Huan Ma;Pengjie Guo;Hechang Lei;Shancai Wang(Department of Physics,Key Laboratory of Quantum State Construction and Manipulation,Renmin University of China,Beijing 100872,China;Beijing Key Laboratory of Opto-Electronic Functional Materials&Micro-Nano Devices,Renmin University of China,Beijing 100872,China)

机构地区：[1]Department of Physics,Key Laboratory of Quantum State Construction and Manipulation,Renmin University of China,Beijing 100872,China [2]Beijing Key Laboratory of Opto-Electronic Functional Materials&Micro-Nano Devices,Renmin University of China,Beijing 100872,China

出　　处：《Chinese Physics B》2024年第4期146-151,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.12274455,12274459,and 12204533);the National Key R&D Program of China (Grant No.2022YFA1403800);the Beijing Natural Science Foundation (Grant No.Z200005)。

摘　　要：Using angle-resolved photoemission spectroscopy and density functional theory calculations methods,we investigate the electronic structures and topological properties of ternary tellurides NbIrTe_(4),a candidate for type-II Weyl semimetal.We demonstrate the presence of several Fermi arcs connecting their corresponding Weyl points on both termination surfaces of the topological material.Our analysis reveals the existence of Dirac points,in addition to Weyl points,giving both theoretical and experimental evidences of the coexistence of Dirac and Weyl points in a single material.These findings not only confirm NbIrTe_(4) as a unique topological semimetal but also open avenues for exploring novel electronic devices based on its coexisting Dirac and Weyl fermions.

关 键 词：Fermi arc Weyl point Dirac point angle-resolved photoemission spectroscopy 

分 类 号：O469[理学—凝聚态物理]