Tiling of the fivefold surface of Al70Pd21Mn9

SURFACE SCIENCE

卷:492

Letter

Ledieu, J ; McGrath, R ; Diehl, RD ; Lograsso, TA ; Delaney, DW ; Papadopolos, Z ; Kasner, G

关键词: low energy electron diffraction (LEED);    scanning tunneling microscopy;    surface structure, morphology, roughness, and;    topography;    alloys;   

DOI  :  10.1016/S0039-6028(01)01463-7

来源: Elsevier

【 摘 要 】

The nature of the fivefold surface of Al70Pd21Mn9 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 F*(((P1)r)) obtained from the geometric model based on the three-dimensional tiling F*((2F)). The results provide direct confirmation that the fivefold surface of i-Al-Pd-Mn is a termination of the bulk structure. (C) 2001 Elsevier Science B.V. All rights reserved.

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