Universal optical features of Dirac cone networks: The case of BaNiS2

D. Santos-Cottin, 2, 3, ∗ M. Casula, L. de’ Medici, 2 F. Le Mardelé, J. Wyzula, M. Orlita, 6 Y. Klein, A. Gauzzi, Ana Akrap, and R. P. S. M. Lobo 2, † LPEM, ESPCI Paris; CNRS; PSL University, 10 rue Vauquelin, F-75005 Paris, France Sorbonne Université, CNRS, LPEM, F-75005 Paris, France Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland Sorbonne Universités, UPMC University of Paris 6; IMPMC, CNRS, F-75005 Paris, France LNCMI, CNRS-UGA-UPS-INSA, 25, avenue des Martyrs, F-38042 Grenoble, France Institute of Physics, Charles University in Prague, CZ-12116 Prague, Czech Republic (Dated: April 13, 2021)