Ordering of atomic monolayers on a (001) cubic crystal surface.

The self-organization of a chemisorbed monolayer is studied as a two-dimensional ordering process in the presence of surface stress. As proved previously for a single phase separation, a steady surface state is yielded from the competition between the domain boundary energy and the surface stress elastic energy. In the present Letter, the resulting patterns are shown to depend on the interplay between the symmetries of both the internal layer order and the underlying crystal. For experimental relevance, our study is focused on a (001) copper surface.