Realistic band structure of cuprous chloride

The reflection spectrum of cleaved monocrystals of CuCl is measured at many temperatures between 6 and 300 K in the vacuum ultraviolet range up to 30 eV. With the use of the experimental data, energy levels at high-symmetry points Γ(000), X((2πa)(001)), and L((πa)(111)) are proposed. A Slater-Koster scheme is then used to generate a full band scheme. We present the density of states and the joint density of states and discuss the merits of this band structure in the light of other experiments (absorption, photoemission, as well as existing theoretical calculations.