| Autor: |
Johansson, L.S.O., Grehk, T.M., Gray, S.M., Johansson, M., Flodström, A.S. |
| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section B; May 1995, Vol. 97 Issue: 1-4 p364-367, 4p |
| Abstrakt: |
In this high-resolution core-level photoelectron spectroscopy study, the adsorption of lithium on the Si(100)2 × 1 surface has been studied for low Li coverages. The basic dimer reconstruction of the clean surface was preserved up to a coverage corresponding to a work function change of Δφ=−1.8eV, as indicated by low-energy electron diffraction (LEED) and the Li 1s and Si 2p core-level spectra. The changes in the Si 2p spectra indicate that the surface reconstruction has changed from asymmetric to symmetric dimers at this 2 × 1 saturation coverage, with the dimer atoms giving rise to a single Si 2p core-level binding-energy shift of −0.37 eV. For higher Li coverages the Li atoms react with the substrate under the formation of Li silicides. |
| Databáze: |
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