Topological nodal-line fermions in spin-orbit metal PbTaSe2

  title={Topological nodal-line fermions in spin-orbit metal PbTaSe2},
  author={Guang Bian and Tay-Rong Chang and Raman Sankar and S. Xu and Hongyu Zheng and Titus Neupert and Ching-Kai Chiu and Shin-Ming Huang and Guoqing Chang and Ilya Belopolski and Daniel S. Sanchez and Madhab Neupane and Nasser Alidoust and Chang Liu and BaoKai Wang and Chi-Cheng Lee and Horng-Tay Jeng and Chenglong Zhang and Zhujun Yuan and Shuang Jia and Arun Bansil and Fangcheng Chou and Hsin Lin and Md. Hasan},
  booktitle={Nature communications},
Topological semimetals can support one-dimensional Fermi lines or zero-dimensional Weyl points in momentum space, where the valence and conduction bands touch. While the degeneracy points in Weyl semimetals are robust against any perturbation that preserves translational symmetry, nodal lines require protection by additional crystalline symmetries such as mirror reflection. Here we report, based on a systematic theoretical study and a detailed experimental characterization, the existence of… CONTINUE READING
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