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- W1966160545 abstract "Abstract We have studied the electronic structures of lithium, sodium and potassium-adsorbed Si(100)2 × 1 surfaces with angle-resolved direct and inverse photoemission. An empty, overlayer-derived state appeared for all three adsorbates at submonolayer coverage and shifted downwards in energy for increasing coverage. It is assigned to alkali-metal n p z or mixed n s− n p z orbitals. For potassium it showed a strong dispersion and the minimum of this band reached the Fermi level ( E F ) at saturation and made the surface metallic. For sodium and even more for lithium it showed weaker dispersions and smaller energy shifts with the energy positions 0.7 and 2.0 eV above E F , respectively, for the saturated 2 × 1 surfaces. These differences are assigned to alkali-metal (AM) size effects, where a smaller size results in a stronger AMSi interaction and a weaker AMAM interaction on the 2 × 1-reconstructed surface." @default.
- W1966160545 created "2016-06-24" @default.
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- W1966160545 date "1993-05-01" @default.
- W1966160545 modified "2023-09-25" @default.
- W1966160545 title "Alkali metals on Si(100) 2 × 1: comparative study of the surface electronic structures for Li, Na and K adsorption" @default.
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- W1966160545 doi "https://doi.org/10.1016/0167-2584(93)90484-z" @default.
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