On thed-electron surface density of states of transition metals

Using the moment method and the continued fraction expansion for the one-particle Green's function we have studied thed-electron surface density of states for a transition metal. Besides the reduction of nearest neighbours for a surface atom compared to a bulk atom we have also taken into account the effect that the atomic environment of a surface atom is quite different from that of a bulk atom. This leads to important modifications in the surface density of states which can effect e.g. magnetic surface properties.Work supported in part by the ESIS program (Universities of Liege and Antwerpen)