Universal optical conductivity of a disordered Weyl semimetal

@article{Roy2016UniversalOC,
  title={Universal optical conductivity of a disordered Weyl semimetal},
  author={Bitan Roy and Vladimir Juri{\vc}i{\'c} and Sankar Das Sarma},
  journal={Scientific Reports},
  year={2016},
  volume={6}
}
Topological Weyl semimetals, besides manifesting chiral anomaly, can also accommodate a disorder-driven unconventional quantum phase transition into a metallic phase. A fundamentally and practically important question in this regard concerns an experimentally measurable quantity that can clearly distinguish these two phases. We show that the optical conductivity while serving this purpose can also play the role of a bonafide order parameter across such disorder-driven semimetal-metal quantum… 
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