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Geometric and electronic structure of molecular beam epitaxy-prepared GaAs (112) and (113) surfaces

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Platen,  Jutta
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Setzer,  Carsten
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Geng,  Peter
Fritz Haber Institute, Max Planck Society;

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Ranke,  Wolfgang
Fritz Haber Institute, Max Planck Society;

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Jacobi,  Karl
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Platen, J., Setzer, C., Geng, P., Ranke, W., & Jacobi, K. (1997). Geometric and electronic structure of molecular beam epitaxy-prepared GaAs (112) and (113) surfaces. Microelectronics Journal, 28(8-10), 969-976. doi:10.1016/S0026-2692(96)00136-X.


Cite as: https://hdl.handle.net/21.11116/0000-0008-B4C7-C
Abstract
The surface structure and the electronic properties of the high-index molecular beam epitaxy (MBE)-prepared GaAs surfaces (112)A and B as well as (113)A and B were investigated in situ by low-energy electron diffraction and surface core level spectroscopy. Under MBE conditions, both (112) surfaces are unstable. The (112)A surface consists of five kinds of facets with the orientations {110}, {124} and (111). The (̅1̅1̅2)B surface forms four types of facets with the orientations (̅1̅1̅1), (̅1̅1̅3) and {̅1̅1̅0}. The surface core-level shift analysis on GaAs(112)A yields surface components for the As 3d peak (−0.31eV) as well as for the Ga 3d peak (+0.28eV). On GaAs(113)A both the (8×1) superstructure and the core-level analysis support a structure model proposed recently by Wassermeier et al. (Phys. Rev. B, 57. (1995) 14721). After MBE preparation, the (̅1̅1̅3)B surface forms facets with the orientations (̅1̅1̅0) and (̅1̅1̅1).