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- W2002981105 abstract "Ag(111) films were deposited at room temperature onto H-passivated Si(111)-(1x1) substrates, and subsequently annealed at 300 C. An abrupt non-reactive Ag/Si interface is formed, and very uniform non-strained Ag(111) films of 6-12 monolayers have been grown. Angle resolved photoemission spectroscopy has been used to study the valence band electronic properties of these films. Well-defined Ag sp quantum-well states (QWS) have been observed at discrete energies between 0.5-2eV below the Fermi level, and their dispersions have been measured along the GammaK, GammaMM'and GammaL symmetry directions. QWS show a parabolic bidimensional dispersion, with in-plane effective mass of 0.38-0.50mo, along the GammaK and GammaMM' directions, whereas no dispersion has been found along the GammaL direction, indicating the low-dimensional electronic character of these states. The binding energy dependence of the QWS as a function of Ag film thickness has been analyzed in the framework of the phase accumulation model. According to this model, a reflectivity of 70% has been estimated for the Ag-sp states at the Ag/H/Si(111)-(1x1) interface." @default.
- W2002981105 created "2016-06-24" @default.
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- W2002981105 date "2002-04-24" @default.
- W2002981105 modified "2023-10-18" @default.
- W2002981105 title "Quantum-well states in ultrathin Ag(111) films deposited onto H-passivated Si(111)-(1×1) surfaces" @default.
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- W2002981105 doi "https://doi.org/10.1103/physrevb.65.195410" @default.
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