Extended Data Fig. 1: Reflectance spectra.
From: Unconventional free charge in the correlated semimetal Nd2Ir2O7

Solid curves: Near normal incidence reflectivity, R=∣r∣2, of Nd2Ir2O7 for selected temperatures. Dotted curves below 50 cm−1: Extrapolations using simultaneous Drude–Lorentz fitting to the reflectance spectra and the ellipsometric data beween 4000 and 18000 cm−1 of Extended Data Fig. 2. a, Between 30 and 300 K. b, Between 6 and 30 K.