Abstract
Calculated low-energy electron diffraction spectra for overlayer structures of O, S, Se, and Te on Ni(001) show very good agreement with experiment for fourfold coordinated bonding sites and displacements of 0.90, 1.30, 1.45, and 1.90 ± 0.1 Å, respectively, from the center of the first layer of nickel atoms. These adsorbate-atom locations correspond to Ni-chalcogen bond lengths smaller than occur in bulk compounds, but comparable to those found in divalent Ni-chelate complexes.
- Received 25 June 1973
DOI:https://doi.org/10.1103/PhysRevLett.31.540
©1973 American Physical Society