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- W2045137075 abstract "Reconstructed surfaces on Sb-irradiated GaAs(0 0 1) formed by molecular beam epitaxy have been studied by in-situ scanning tunneling microscopy (STM). The reflection high-energy electron diffraction patterns showed (2×3) [or weak (4×3)] structure. The step density was about five times higher than that of GaAs(0 0 1)-c(4×4) surface. It was found that there were swinging dimer rows along to the [1 1¯ 0] direction, which seemed not to consist of a specified reconstruction. We proposed two (2×3)-structure models for these swinging dimers. By first-principles calculation, we found that the proposed models were stable and with energy difference was 0.17 eV, indicating the coexistence of the two structures. Moreover, we proposed three (4×3) reconstruction models based on these (2×3) models. The electron counting rule was applied for these models, indicating that there was an excessive amount of electrons. By two bias-alternative STM images, it was found that the many spots appear only in empty-state. These might be segregated Ga or Sb cluster and strongly relate to the excessive amount of electrons." @default.
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- W2045137075 date "2007-04-01" @default.
- W2045137075 modified "2023-10-03" @default.
- W2045137075 title "Surface reconstructions on Sb-irradiated GaAs(0 0 1) formed by molecular beam epitaxy" @default.
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- W2045137075 doi "https://doi.org/10.1016/j.mejo.2007.02.001" @default.
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