Observation of a topological insulator Dirac cone reshaped by non-magnetic impurity resonance

  title={Observation of a topological insulator Dirac cone reshaped by non-magnetic impurity resonance},
  author={Lin Miao and Yishuai Xu and Wenhan Zhang and Daniel Older and S. Alexander Breitweiser and Erica C. Kotta and Haowei He and Takehito Suzuki and Jonathan D. Denlinger and Rudro R. Biswas and Joseph G. Checkelsky and Weida Wu and L. Andrew Wray},
  journal={npj Quantum Materials},
The massless Dirac electrons found at topological insulator surfaces are thought to be influenced very little by weak, non-magnetic disorder. However, a resonance effect of strongly perturbing non-magnetic impurities has been theoretically predicted to change the dispersion and physical nature of low-energy quasiparticles, resulting in unique particle-like states that lack microscopic translational symmetry. Here we report the direct observation of impurities reshaping the surface Dirac cone of… 
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