Peculiarities of Al magic cluster self-assembly on Si(1 0 0) surface |
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Authors: | VG Kotlyar YuV Luniakov AV Zotov AA Saranin |
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Institution: | 1. Institute of Automation and Control Processes, 5 Radio Street, 690041 Vladivostok, Russia;2. Faculty of Physics and Engineering, Far Eastern State University, 690000 Vladivostok, Russia;3. Department of Electronics, Vladivostok State University of Economics and Service, 690600 Vladivostok, Russia |
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Abstract: | Using scanning tunneling microscopy observations and density functional theory calculations, regularities of the Al magic cluster array self-assembly on Si(1 0 0) surface has been elucidated. While a single Al cluster occupies an area of 4a × 3a, an ordered Al-cluster array exhibits a 4 × 5 periodicity, as the clusters in the array are separated by the 4a × 2a “spacers”. The plausible structural model for the “spacer” was proposed in which the “spacer” is arranged as an ordinary 4a × 3a-Al cluster in which the central atomic row with the topmost Si atom is missing. Appearance of the “spacers” in the Al-cluster array was found to reduce formation energy of the array. Ability to incorporate the rows of Al-“spacers” into the completed 4 × 3 In-cluster array was demonstrated. |
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