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Electronic states of ordered overlayers on a tight-binding metal surface two-level adsorbate

✍ Scribed by K. Masuda

Book ID
104546885
Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
405 KB
Volume
114
Category
Article
ISSN
0370-1972

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✦ Synopsis

Abstract

The electronic states of ordered overlayers, with c(2 × 2), p(2 × 1), and c(4 × 2) structures, are investigated using the Green's function formalism and the phase‐shift technique. A two‐level (at E~1~ and E~2~) adsorbate on a tight‐binding (TB) metal surface is used which is applicable to the adsorption of di‐atomic molecules on transition metal surfaces It is shown that the indirect interactions between two‐level adsorbates play an important role in determining the electronic states of the chemisorbed layers. Also the change in the electronic density of states (DOS) is investigated during the dissociation of di‐atomic molecules and it is pointed out that there are marked differences in the electronic structures between the dissociated and undissociated adsorbate states.

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The electronic structures of Pd and Pt epitaxiai monolayers on Re and Ru (000 1) surfaces are studied within a self-consistent semi-empirical scheme. To this purpose an s-d-electron tight-binding Hamiltonian is treated by the recursion method. The overlayer d bands are shifted to higher binding ener