Electrodynamics on Fermi Cyclides in Nodal Line Semimetals.

  title={Electrodynamics on Fermi Cyclides in Nodal Line Semimetals.},
  author={Seongjin Ahn and Eugene J. Mele and Hongki Min},
  journal={Physical review letters},
  volume={119 14},
We study the frequency-dependent conductivity of nodal line semimetals (NLSMs), focusing on the effects of carrier density and energy dispersion on the nodal line. We find that the low-frequency conductivity has a rich spectral structure which can be understood using scaling rules derived from the geometry of their Dupin cyclide Fermi surfaces. We identify different frequency regimes, find scaling rules for the optical conductivity in each, and demonstrate them with numerical calculations of… 

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