Final-state effects in high-resolution angle-resolved photoemission from Ni(110)

Angle-resolved photoemission with polarized synchrotron radiation is measured from a ferromagnetic single-crystal Ni(110) surface. Polarization dependence and dispersion with k(parallel to) of spectral structures along the high-symmetry lines Gamma-K-X of the bulk Brillouin zone is discussed. An ab initio calculation within the one-step theory of photoemission reveals the relation of the observed structures to initial and final states. The energy-momentum distribution of photoemission intensity depending on the light polarization and experimental geometry is explained in terms of even and odd symmetry of the valence-band states with respect to the crystal mirror plane.