A model of step geometry on the reconstructed W?(001) surface

Abstract

The values of surface force constants indicate the presence ofccmpressive surface stress on the ideal W (Ml) surface, suppcsin g that surface interactions can be described by an effective mobcdy potential. Combining this idea with a phenomenological model of lloelolh et aL, we find that surface steps should expand at their edges and that the polarization of the reconstruction on the W (ml) surface perpendicular to the step edge is preferred. 1.Introduction.