A superstructural 2D-phase diagram for Ga on the Si(111)- 7x7 system
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Auger electron spectroscopy
Low-energy electron diffraction
The adsorption of bismuth onto the Au(111) surface has been investigated with use of the surface techniques of Auger-electron spectroscopy, low-energy electron diffraction, electron-energy-loss spectroscopy, and work-function measurements. The interaction of oxygen with adsorbed Bi on Au(111) has also been studied to further the understanding of the Bi-Au system. The results indicate that bismuth forms a single monolayer followed by the growth of a Bi-Au compound below this layer. The monolayer is not quite close packed and BiAu is the stoichiometry suggested for the compound. These results contradict those of an earlier study which suggested that Bi forms a close-packed monolayer followed by three-dimensional island growth (Stranski-Krastanov growth).
Bismuth
Auger electron spectroscopy
Low-energy electron diffraction
Electron spectroscopy
Stoichiometry
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Auger electron spectroscopy
Low-energy electron diffraction
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Auger electron spectroscopy
Low-energy electron diffraction
Electron spectroscopy
Energy-dispersive X-ray spectroscopy
Deposition
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Auger electron spectroscopy
Low-energy electron diffraction
Thermal desorption spectroscopy
Surface reconstruction
Thermal desorption
Torr
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Auger electron spectroscopy
Low-energy electron diffraction
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The β-SiC(100) surface has been studied by low energy electron diffraction (LEED), Auger electron spectroscopy (AES), high resolution electron energy loss spectra (HREELS), and core level excitation EELS. Two new Si-terminated phases have been discovered, one with (3×2) symmetry, and the other with (2×1) symmetry. Models are presented to describe these phases. New results, for the C-rich surface, are presented and discussed. In addition, core level excitation EELS results are given and compared with theory.
Auger electron spectroscopy
Low-energy electron diffraction
Electron spectroscopy
Energy-dispersive X-ray spectroscopy
Electron excitation
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Auger electron spectroscopy
Low-energy electron diffraction
Electron spectroscopy
Energy-dispersive X-ray spectroscopy
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Overlayer
Auger electron spectroscopy
Low-energy electron diffraction
Deposition
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Abstract This paper provides a brief introduction to the theory and practice of low-energy electron diffraction, a tcchnique which is proving useful for investigating the structure of surfaces. Emphasis is given to clean well-defined surfaces which are studied also with Auger electron spectroscopy and under conditions of ultra-high vacuum. Knowledge of surface structure is of fundamental and technological interest, and, although only two-dimensional periodicities in surface regions are obtained directly from diffraction patterns, even this has led to the discovery of unexpected structural arrangements. Recently there has been substantial progress in the understanding of diffracted beam intensities, and procedures are reviewed for extracting surface structures from measured intensities.
Low-energy electron diffraction
Auger electron spectroscopy
Surface structure
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At 700 K, the oxidation with 1 L O2 of CoGa(001) was investigated by means of high-resolution electron energy loss spectroscopy (EELS), low-energy electron diffraction, Auger electron spectroscopy, and scanning tunneling microscopy (STM). Oxidation with 1 L O2 at 700 K leads to the formation of long, rectangular islands of β-Ga2O3 oriented in the [100] and [010] directions of the substrate. EEL spectra of the islands of β-Ga2O3 show intense Fuchs–Kliewer (FK) modes at 305, 455, 645, and 780 cm−1. The β-Ga2O3 islands are well ordered and show a (2×1) structure with two domains, oriented perpendicular to each other. The two-dimensional lattice parameters of β-Ga2O3 are determined to be a=2.8±0.1 Å and b=5.8±0.1 Å.
Auger electron spectroscopy
Low-energy electron diffraction
Energy-dispersive X-ray spectroscopy
Electron spectroscopy
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