Tiling of the fivefold surface of Al sub 70 Pd sub 21 Mn sub 9

The nature of the fivefold surface of Al sub 70 Pd sub 21 Mn sub 9 has been investigated using scanning tunnelling microscopy. From high resolution images of the terraces, a tiling of the surface has been constructed using pentagonal prototiles. This tiling matches the bulk model of Boudard et al. [...

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Veröffentlicht in:Surface science 2001-10, Vol.492 (3), p.L729-L734
Hauptverfasser: Ledieu, J, McGrath, R, Diehl, R D, Lograsso, T A, Delaney, D W, Papadopolos, Z, Kasner, G
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Sprache:eng
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Zusammenfassung:The nature of the fivefold surface of Al sub 70 Pd sub 21 Mn sub 9 has been investigated using scanning tunnelling microscopy. From high resolution images of the terraces, a tiling of the surface has been constructed using pentagonal prototiles. This tiling matches the bulk model of Boudard et al. [J. Phys.: Cond. Matter 4 (1992) 10149], which allows us to elucidate the atomic nature of the surface. Furthermore, it is consistent with a Penrose tiling T exp *((P1)r) obtained from the geometric model based on the three-dimensional tiling T exp *(2F) . The results provide direct confirmation that the fivefold surface of i-Al-Pd-Mn is a termination of the bulk structure.
ISSN:0039-6028