Discovery of a Weyl fermion semimetal and topological Fermi arcs

  title={Discovery of a Weyl fermion semimetal and topological Fermi arcs},
  author={Su-Yang Xu and Ilya Belopolski and Nasser Alidoust and Madhab Neupane and Guang Bian and Chenglong Zhang and Raman Sankar and Guoqing Chang and Zhujun Yuan and Chi-Cheng Lee and Shin-Ming Huang and Hao Zheng and Jie Ma and D. Sevilla Sanchez and BaoKai Wang and Arun Bansil and F. C. Chou and Pavel P Shibayev and Hsin Lin and Shuang Jia and M Zahid Hasan},
  pages={613 - 617}
Weyl physics emerges in the laboratory Weyl fermions—massless particles with half-integer spin—were once mistakenly thought to describe neutrinos. Although not yet observed among elementary particles, Weyl fermions may exist as collective excitations in so-called Weyl semimetals. These materials have an unusual band structure in which the linearly dispersing valence and conduction bands meet at discrete “Weyl points.” Xu et al. used photoemission spectroscopy to identify TaAs as a Weyl… Expand
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  • X. Chen
  • Physics
  • Science China Materials
  • 2015
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