Calculation of the spectral densities of the surface alloy system (PtcCu1 - c1 Cu(100)

H. Grimech, A. Khater

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    Abstract

    A formalism for calculating the mean spectral densities of the disordered surface alloy system (PtcCu1 - c)1 Cu(100), is presented, using simultaneously the matching and the Green functions methods. The surface vibrational dynamics are developed using an effective field approach that goes in principle beyond the mean field approximation. Describing the surface layer (PtcCu1 - c) by a random distribution of Pt and Cu atoms, we present numerical results for surface spectral densities, and surface mean-square displacements in this system, as a function of the defect concentration c (0 ≤ c ≤ 1).

    Original languageEnglish
    Pages (from-to)198-206
    Number of pages9
    JournalSurface Science
    Volume323
    Issue number3
    DOIs
    Publication statusPublished - 20 Jan 1995

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    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Materials Chemistry

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