Theory of Electronic Raman Scattering in Disordered Unconventional Superconductors

A theory for the effect of impurity scattering on electronic Raman scattering in unconventional superconductors is presented. The impurity dependence of the spectra present a clear qualitative way to distinguish between conventional (anisotropic $s$-wave) or unconventional ( $d$-wave) energy gaps.