The spin dependence of photoemission intensities off the surface normal, from the (1,1,1) face of platinum

Using a previously developed, relativistic theory of photoemission the authors calculate the off-normal photocurrent emerging from the (1,1,1) face of a platinum single crystal irradiated by normally incident, circularly polarised photons. They study the dependence of the photoemission intensities on the helicity of the photons and the spin and direction of the emitted electrons. The results support the recent suggestion of Oepen and co-workers (1986) that photoemission experiments with circularly polarised light can provide useful information about the spin structure of the electronic spectra of solids, even if the spin polarisation of the photocurrent is not measured.