THEORY OF CHEMISORPTION ON METAL SURFACES AT FINITE SUBMONOLAYER COVERAGES

Abstract

A chemisorption theory of hydrogen-like atoms on metal surfaces at submonolayer coverages, based on the generalized Anderson-Newns Hamiltonian and Green’s Function formalism, is presented. A very general Hamiltonian with the terms proportional to three and four adion number operators was derived. The utility of this Hamiltonian in the context of the lattice gas model of the chemisorbed layer with non-additive lateral interactions is discussed. The coverage-dependence of the electronic structure of chemisorbed adlayer is investigated. It is shown, that the adatom ionization level’s self-energy is evidently coverage dependent as opposite to this one corresponding to the affinity level.