Spin-dependent Optical Properties of Multiferroic EuO and GdN

We present a first-principles study on the linear and non-linear optical properties of multiferroic EuO and GdN. In particular, we have decomposed the linear and non-linear optical spectra into spin-dependant terms, i.e., we could obtain optical spectra from individual spin channel. With the help of such method, a regular optical spectrum could present information of spin-dependent band structures, which is of great importance to the study of ferromagnetic insulators.