期刊
NATURE PHYSICS
卷 11, 期 9, 页码 728-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS3425
关键词
-
资金
- EPSRC (UK) [EP/K04074X/1]
- DARPA (US) MESO project [N66001-11-1-4105]
- Department of Energy, Office of Basic Energy Science [DE-AC02-05CH11231]
- Engineering and Physical Sciences Research Council [EP/K04074X/1, EP/M020517/1] Funding Source: researchfish
- EPSRC [EP/M020517/1, EP/K04074X/1] Funding Source: UKRI
Three-dimensional (3D) topological Weyl semimetals (TWSs) represent a state of quantum matter with unusual electronic structures that resemble both a '3D graphene' and a topological insulator. Their electronic structure displays pairs of Weyl points (through which the electronic bands disperse linearly along all three momentum directions) connected by topological surface states, forming a unique arc-like Fermi surface (FS). Each Weyl point is chiral and contains half the degrees of freedom of a Dirac point, and can be viewed as a magnetic monopole in momentum space. By performing angle-resolved photoemission spectroscopy on the non-centrosymmetric compound TaAs, here we report its complete band structure, including the unique Fermi-arc FS and linear bulk band dispersion across the Weyl points, in agreement with the theoretical calculations1,2. This discovery not only confirms TaAs as a 3DTWS, but also provides an ideal platform for realizing exotic physical phenomena (for example, negative magnetoresistance, chiral magnetic effects and the quantum anomalous Hall effect) which may also lead to novel future applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据