Alpha-Gallium (010) surface reconstruction: a LEED structural analysis of the (1x1) room temperature and (2rt2xrt2)R45 degrees low temperature structures

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The geometric structure of the alpha-Ga(010)-(1x1) room temperature structure and its (2rt2xrt2) R45 degrees reconstruction below 232 K have been determined using Low Energy Electron Diffraction (LEED) structure analysis. The room temperature structure conforms to the cut-dimer model, forming a two-dimensional metallic structure with only minimal lateral displacements of the atoms. The topmost interlayer distance is 1.53 Angstrom, corresponding to a spacing expansion of 2 percent from the bulk. In the low-temperature structure, the surface atoms shift to dimerize within the top two layers, resulting in a network of mostly covalent bonds, which form both parallel and perpendicular to the ... continued below

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More, S.; Soares, E.A.; Van Hove, M.A.; Lizzit, S.; Baraldi, A.; Grutter, Ch. et al. February 28, 2003.

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The geometric structure of the alpha-Ga(010)-(1x1) room temperature structure and its (2rt2xrt2) R45 degrees reconstruction below 232 K have been determined using Low Energy Electron Diffraction (LEED) structure analysis. The room temperature structure conforms to the cut-dimer model, forming a two-dimensional metallic structure with only minimal lateral displacements of the atoms. The topmost interlayer distance is 1.53 Angstrom, corresponding to a spacing expansion of 2 percent from the bulk. In the low-temperature structure, the surface atoms shift to dimerize within the top two layers, resulting in a network of mostly covalent bonds, which form both parallel and perpendicular to the surface plane. The bond lengths of some of these dimers are about 10 percent shorter than the bond length found in the alpha-Ga bulk and are thus shorter than any Ga-Ga bonds reported so far.

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  • Journal Name: Physical Review B; Journal Volume: 68; Journal Issue: 7; Other Information: Journal Publication Date: 2003

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  • Report No.: LBNL--52338
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 821034
  • Archival Resource Key: ark:/67531/metadc735127

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  • February 28, 2003

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  • Oct. 18, 2015, 6:40 p.m.

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More, S.; Soares, E.A.; Van Hove, M.A.; Lizzit, S.; Baraldi, A.; Grutter, Ch. et al. Alpha-Gallium (010) surface reconstruction: a LEED structural analysis of the (1x1) room temperature and (2rt2xrt2)R45 degrees low temperature structures, article, February 28, 2003; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc735127/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.