基于激光的角分辨光电子能谱和双光子光电子能谱对二碲化钨的联合研究

A combined laser-based angle-resolved photoemission spectroscopy and two-photon photoemission spectroscopy study of-WTe.

作者信息

Hein Petra, Jauernik Stephan, Erk Hermann, Yang Lexian, Qi Yanpeng, Sun Yan, Felser Claudia, Bauer Michael

机构信息

Institute of Experimental and Applied Physics, University of Kiel, Leibnizstr. 19, D-24118 Kiel, Germany.

State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China.

出版信息

J Phys Condens Matter. 2020 May 27;32(34). doi: 10.1088/1361-648X/ab8762.

DOI:10.1088/1361-648X/ab8762

PMID:32259800

Abstract

Laser-based angle-resolved photoemission spectroscopy and two-photon photoemission spectroscopy are employed to study the valence electronic structure of the Weyl semimetal candidate-WTealong two high symmetry directions and for binding energies between ≈ -1 eV and 5 eV. The experimental data show a good agreement with band structure calculations. Polarization dependent measurements provide further information on initial and intermediate state symmetry properties with respect to the mirror plane of thestructure of WTe.

摘要

基于激光的角分辨光电子能谱和双光子光电子能谱被用于研究Weyl半金属候选材料-WTe₂沿两个高对称方向以及在约-1电子伏特至5电子伏特结合能范围内的价电子结构。实验数据与能带结构计算结果吻合良好。偏振相关测量提供了关于WTe₂结构镜面的初态和中间态对称性质的更多信息。