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- LELAY, G, et al.
(författare)
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STM AND SYNCHROTRON-RADIATION STUDIES OF PROTOTYPICAL METAL-SEMICONDUCTOR SYSTEMS
- 1994
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Ingår i: Surface Science. - : Elsevier BV. - 0039-6028 .- 1879-2758. ; 307, s. 280-294
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Tidskriftsartikel (refereegranskat)abstract
- Since the origin of surface science noble metal/elemental semiconductor couples have been considered as ''prototypical'' systems. After three decades of research their structural and electronic properties remain an intriguing maze despite recent advances made, especially thanks to the development of the near-field microscopies and the ''tensive use of synchrotron radiation in surface crystallography and in high-resolution photoelectron spectroscopy. In the last few years, lead, as a replacement inert metal, has nearly gained the pole position in the display of exotic behaviour. This paper gives a flavour of this mystery story and highlights some puzzling questions.
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- Uhrberg, RIG, et al.
(författare)
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Photoelectron spectroscopy study of Ag/Si(111)root 3X root 3 and the effect of additional Ag adatoms
- 2002
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Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 65:8
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Tidskriftsartikel (refereegranskat)abstract
- High-resolution core-level spectroscopy has been applied to the Ag/Si(111)root3xroot3 surface. The Si 2p line shape is found to depend critically on the presence of additional Ag adatoms on the surface. A significant broadening caused by the surplus of Ag atoms could be eliminated by careful annealing. The resulting Si 2p spectra are significantly sharper than any published data for this or other Si based surface systems. Two major surface components are identified for the root3xroot3 surface, which find a natural explanation in terms of the honeycomb-chained-trimer model. A small but characteristic contribution to the Si 2p spectrum of the Ag/root3xroot3 surface is tentatively assigned to defects.
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- Zhang, HM, et al.
(författare)
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Core-level photoelectron spectroscopy study of the Au/Si(111) 5X2, alpha-root 3X root 3, beta-root 3X root 3, and 6X6 surfaces
- 2002
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Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 65:3
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Tidskriftsartikel (refereegranskat)abstract
- Submonolayer coverages of Au on Si(111), known as the 5 X 2, alpha- root3 X root3, beta- root3 X root3, 2root21 X 2root21, and 6 X 6 surfaces, have been investigated by low-energy electron diffraction and photoelectron spectroscopy. Three Si 2p surface components on the 5 X 2 surface, and four surface components on the alpha- root3 X root3, quenched beta- root3 X root3, and 6 X 6 surfaces have been identified by surface sensitive high resolution core-level spectroscopy. The photoemission data of the alpha- root3 X root3, the 6 X 6 and the quenched beta- root3 X root3 phases are discussed in terms of extra Au adatoms on the root3 X root3 surface described by the ideal 1 ML conjugate honeycomb chained trimer model. The similarity between the 6 X 6 and the quenched beta- root3 X root3 surface is obvious from the decomposition of the Si 2p spectra, suggesting an order-disorder relation.
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