Temperature-dependent Optical Conductivity for a Simple Model of a Nodal-line Semimetal Under Strain

We report on the temperature dependent optical conductivity for a simple model of a nodal- line semimetal (NLSM). The effect of strain is included through a parameter α which is effective on the distortion of the energy bands within the first Brillouin zone. With a model Hamiltonian and the Kubo formula, we derive semi-analytic results for both transverse and longitudinal optical conductivity including both intra and interband contributions. We compare our results with those for ZrZiS like material having similar band structure which is different than that of 2D or 3D Dirac or Weyl semimetal.