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- W2023542044 abstract "The structure of the HfC(111) clean surface and the O2, D2 adsorption systems at room temperature have been studied by impact collision ion scattering spectroscopy (ICISS). The clean surface exhibits a 1 × 1 low energy electron diffraction (LEED) pattern and no reconstruction occurs. The outermost layer consists of Hf atoms and the space between the first and second layer contracts by 0.18 ± 0.05 Å, which is equal to (13.4 ± 3.7)% of the corresponding bulk value. The oxygen-adsorbed surface has a 1 × 1 structure and the O atom is located on the threefold hollow site, under which a Hf atom of third layer exists. By comparing the ICISS spectra with computer simulations, the distance between the O atom and the surface has been determined at 0.90 ± 0.05 Å (O-Hf bond length = 2.10 ± 0.07 Å). In case of deuterium, D, the atom is adsorbed on the same site as oxygen and the distance from the surface is 1.36 ± 0.07 Å (D-Hf bond length = 2.33 ± 0.10 Å). Judging from the distance between the Hf atom and the adsorbates, the Hf-O bond seems to be rather ionic and the Hf-D bond seems covalent." @default.
- W2023542044 created "2016-06-24" @default.
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- W2023542044 date "1992-10-01" @default.
- W2023542044 modified "2023-10-06" @default.
- W2023542044 title "Analysis of the HfC(111) surface structure by impact collision ion scattering spectroscopy (ICISS)" @default.
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- W2023542044 doi "https://doi.org/10.1016/0039-6028(92)90717-k" @default.
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