where σ #$%&' (ω) is the frequency-dependent optical conductivity from classical Drude model, the fitting term * (, ! -) " is treated as a single localization parameter with C being unity, kF is the Fermi wavevector and l is the carrier mean free path, and τ is the scattering time. Note that the localization parameter theoretically determines the decrease of DC conductivity from σ #$%&' (0) to σ !"# (0) = σ #$%&' (0) 41 -* (, ! -) " 5 due to the localization. Here, * (, ! -) " was 0.18 in the model, leaving σ !#" (0) = 465 S/cm in excellent agreement with the 445 S/cm DC conductivity measured in experiment (Supplementary Fig. ). Since the localization is very weak, we also note that it is possible to fit the model with classical Drude and Lorentz oscillators with relatively small errors when predicting DC and low-frequency optical conductivity.