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.