Fig. 2
From: Optical signatures of energy gap in correlated Dirac fermions
Optical conductivity fitting. a Experimental optical conductivity and the Drude (low-energy incoherent carrier contribution) + Lorentz (high-energy excitations) + Fano modes (vibrational features) fitting at 0.3 GPa as example. Three main vibration modes (ν3, ν7, and ν9) are labeled consistently with the literature. b Optical conductivity spectra after the vibrational features are subtracted is given with the different contributions. Gray shaded area demonstrate the spectral region, where the diamond absorption due to the pressure cell is dominated
