Optical Properties of Dilute CuAl$_{1-x}$Fe$_x$O$_2$ Delafossite Alloys

For powder samples of CuAl$_{1-x}$Fe$_x$O$_2$ ($x =$ 0, 0.01, 0.05, and 0.1), measured optical properties are compared with model simulations and phonon spectra are compared with simulations based on weighted dynamical matrix approach.