Two-Dimensional Conical Dispersion in ZrTe_{5} Evidenced by Optical Spectroscopy.

  title={Two-Dimensional Conical Dispersion in ZrTe\_\{5\} Evidenced by Optical Spectroscopy.},
  author={Edoardo Martino and Iris Crassee and Gaku Eguchi and David Santos-Cottin and Ruidan Zhong and Genda Gu and Helmuth Berger and Zoran Rukelj and Milan Orlita and Christopher C. Homes and Ana Akrap},
  journal={Physical review letters},
  volume={122 21},
Zirconium pentatelluride was recently reported to be a 3D Dirac semimetal, with a single conical band, located at the center of the Brillouin zone. The cone's lack of protection by the lattice symmetry immediately sparked vast discussions about the size and topological or trivial nature of a possible gap opening. Here, we report on a combined optical and transport study of ZrTe_{5}, which reveals an alternative view of electronic bands in this material. We conclude that the dispersion is… 
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