Electrodynamics on Fermi Cyclides in Nodal Line Semimetals

Abstract

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 the inter- and intraband contributions to the optical conductivity using a low-energy model for a generic NLSM.

5 pages, 5 figures + supplementary material (8 pages)

References in corpus (3)

• Topological nodal line semimetals
• Classification of reflection symmetry protected topological semimetals and nodal superconductors
• Line of Dirac Nodes in Hyper-Honeycomb Lattices

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