Monolayer chemisorption of HCl and Cl 2 on the Si(001)2 × 1 surface

• Published in: Surface science Vol. 290; no. 1; pp. L662 - L666
• Main Authors: Craig, B.I., Smith, P.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 1993
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/0039-6028(93)90576-6

In an earlier paper results were reported for monolayer chemisorption of HCl, Cl 2 and F 2 onto the Si(001) surface. It has now been discovered that the Cl interactions were not treated correctly in these SLAB-MINDO molecular orbital calculations. The main purpose of this Letter is thus to present the corrected results for both HCl and Cl 2 chemisorption. Dangling bond configurations are now found to represent the lowest energy configurations for both chemisorption processes. This is in contrast to the previously published results in which a bridge site-topology was determined to be the minimum energy structure for Cl 2 chemisorption onto the Si(001)2 × 1 reconstructed surface. These new results are shown to be in good agreement with self-consistent ab-initio Hartree-Fock cluster calculations, with the first-principles local-density calculations of Kruger and Pollmann, and with experiment.