EVIDENCE FOR FANO INTERFERENCE IN SPIN POLARIZATION OF THE 6-EV SATELLITE IN NI VALENCE-BAND PHOTOEMISSION

Spin-polarized photoemission spectra have been measured on the ferromagnetic Ni(110) single crystal. Evidence for the Fano interference effect in the spin polarization of the 6-eV satellite of the valence band has been obtained. The results indicate that the interference effect between the direct 3d electron transition and the 3p core electron excitation followed by the MVV super-Coster-Kronig process to form the two-d-hole bound state is important to explain the behavior of the resonant 6-eV satellite. It is also found that the spin polarization is still large under an off-resonant condition, and this indicates that the direct 3d transition from the majority-spin state is effective to form the two-hole singlet bound state.