Figure 1.

Structural model for the bare Cu(511) surface and the low coverage water phase. (a) Model showing the close packed Cu steps separated by (100) terraces and (b) an STM image showing the regular array of steps aligned along the [01̅1] direction. (c) Structural model for the water monolayer formed at low coverage,²⁸ showing the (31, −31) unit cell and Cu steps indicated by the dashed lines.