Cluster model study of the chemisorption of atomic carbon on Si(100) surfaces

J. Torras, J. M. Ricart, P. Vilarrubias, J. Fraxedas

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    Structural parameters for chemisorption of atomic carbon above a Si(100) surface have been obtained through a Si35H32 cluster model and a MINDO/3 hamiltonian. The most stable position has been found to be the bridge one when considering the unrelaxed surface. The stability increases about 14 kcal/mol when relaxation of the surface is allowed. Further research has been carried out using a reduced cluster model (Si9H12) at the ab initio Hartree-Fock level of calculation. Results confirm the increase of stability of the relaxed system. At this level, the binding energy is 90 kcal/mol for the unrelaxed surface and the stabilization when the surface is relaxed is of about 20% with respect to the non-relaxed surface.
    Original languageEnglish
    Pages (from-to)106-114
    JournalJournal of Crystal Growth
    Issue number1-2
    Publication statusPublished - 1 Jan 1997


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