Spin-polarized angle-resolved photoemission from the (110) surface of platinum

Spin-polarized, angle-resolved photoemission experiments in normal emission from the reconstructed (110) surface of platinum have been performed with circularly polarized synchrotron radiation from the Berlin storage ring BESSY. Along the <110> direction direct transitions with a non-zero spin polarization are only expected if there is considerable hybridization between certain single-group representations in either the initial- or the final-state bands. Our results show spin-polarization values of up to 30% and most of the peaks in the spectra can be understood in terms of direct bulk transitions. The spin-polarization data provide information about the hybridization of the initial states along the <110> direction.