Impurity scattering in Weyl semimetals and their stability classification

@article{Huang2013ImpuritySI,
  title={Impurity scattering in Weyl semimetals and their stability classification},
  author={Zhoushen Huang and Daniel P. Arovas and Alexander V. Balatsky},
  journal={New Journal of Physics},
  year={2013},
  volume={15},
  pages={123019}
}
Weyl semimetals (WS) are a new class of Dirac-type materials exhibiting a phase with bulk energy nodes and an associated vanishing density of states (DOS). We investigate the stability of this nodal DOS suppression in the presence of local impurities and consider whether or not such a suppression can be lifted by impurity-induced resonances. We find that while a scalar (chemical potential type) impurity can always induce a resonance at arbitrary energy and hence lift the DOS suppression at… 
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