Abstract
The charges of adatoms and the work function variation Δϕ caused by the deposition of submonolayer films of alkali metals on the (100) surface of silicon is calculated in the framework of a model that takes into account the dipole-dipole repulsion of adatoms and metallization of the adsorbate layer. Good agreement with the experimental data is achieved. Variation of the model parameters in the sequence Li → Cs is analyzed.
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