Polarization dependence in resonant soft X-ray emission spectroscopy of 3 d transition metal compounds

Abstract

We report experimental studies of polarization dependence in resonant soft X-ray emission of 3 d transition metal compounds. In metal 2 p resonant soft X-ray emission spectra of 3 d 0 systems, transition to the bonding and antibonding states between 3 d 0 and 3d 1 L configurations shows polarization dependence. In TiO 2, the polarization dependence is drastic, whereas it is slightly weak in ScF 3 and extremely weak in KMnO 4. The results are explained by a local symmetry selection rule, strength of hybridization, and phase relation of wave-functions among initial, intermediate, and final states. In oxygen 1 s resonant excitation of undoped cuprate, Sr 2CuO 2Cl 2, we demonstrate that Zhang–Rice singlet excitation, dd excitation, as well as two spin-flip excitations can be distinguished according to their symmetry.