Abstract
We report the observation of a 1D molecular adsorbate band structure caused by direct adsorbate-adsorbate interactions on a semiconductor. For ethylene chemisorbed on two adsorbate-derived electronic states, and , are found to delocalize along the Si-Si dimer rows. The corresponding bands can be followed in reciprocal space from the point into the third surface Brillouin zone. Density functional calculations for ethylene adsorbed on a silicon slab reproduce the experimental 1D band structure and allow us to identify the origin of the lateral interactions.
- Received 15 December 1997
DOI:https://doi.org/10.1103/PhysRevLett.80.4269
©1998 American Physical Society