Band structure of rhodium and photoemission from its low index surfaces

Photoelectron spectra are given of the low index surfaces of rhodium together with band structure calculations which are extended up to 40 eV above the Fermi level. The photoelectron spectra are strongly dependent upon photon energy and crystal orientation. The spectra can be explained reasonably well within the direct model in terms of the band structure calculation using nonrelativistic dipole selection rules. Some features observed in the spectra of the Rh(110) surface indicate that relativistic dipole selection rules may have to be considered.