### Abstract

The atomic structures of the Bi/Si(111)-(sqrt(3) × sqrt(3)) reconstructed surfaces obtained at different adsorbate coverages were studied by dynamical low-energy electron diffraction (LEED) I-V analysis. The experimentally obtained I-V curves of the β-Bi/Si(111)-(sqrt(3) × sqrt(3)) surface, which is formed by a Bi coverage of 1 ML, showed good agreement with the curves calculated for the milk stool model, a model proposed in the literature. In contrast to this result, the I-V curves of the α-phase obtained at a coverage of 1/3 ML do not agree with those reported in early LEED studies. We found that the I-V curves reported in the former LEED studies resemble closely to the results obtained for the surface on which the β and α-phases coexist. Based on the obtained I-V curves, we propose a more reliable structural model for the α-phase, and present the way to determine the presence of a high quality α-phase by using LEED.

Original language | English |
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Pages (from-to) | 1044-1048 |

Number of pages | 5 |

Journal | Surface Science |

Volume | 604 |

Issue number | 11-12 |

DOIs | |

Publication status | Published - Jun 15 2010 |

### All Science Journal Classification (ASJC) codes

- Surfaces and Interfaces
- Condensed Matter Physics
- Materials Chemistry
- Surfaces, Coatings and Films

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## Cite this

*Surface Science*,

*604*(11-12), 1044-1048. https://doi.org/10.1016/j.susc.2010.03.022