Tight-binding model of adsorbate structures

Tight-binding calculations are presented of the ground state energies of me tal atoms absorbed on the surface of the same or similar metals. We conside r rows and clusters of adsorbate, and find significant energy variations as a function of the number of the atoms. Results are presented for the (001) face both for fee and bce crystals. General results that are applicable fo r any elemental fee or bcc crystal are obtained in the present paper. We in clude only s-wave tight-binding orbits in the nearest neighbor approximatio n. [S0163-1829(99)03120-3].