Structure of the tenfold d-Al-Ni-Co quasicrystal surface

N. Ferralis, K. Pussi, E. J. Cox, M. Gierer, J. Ledieu, I. R. Fisher, C. J. Jenks, M. Lindroos, R. McGrath, R. D. Diehl

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Abstract

The structure of the tenfold surface of decagonal Al-Ni-Co was studied using low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM). The surface region is a relaxed truncated bulk structure, having the same composition as the bulk. The outermost layer spacing is contracted by 10% relative to the bulk interlayer spacing, while the next layer spacing is expanded by 5%. A small degree of intralayer rumpling was observed within each layer. There is a one-to-one correspondence between protrusions observed in the STM images and a subset of atoms in the model structure, indicating that in-plane reconstruction is minimal.

Original languageEnglish
Article number153404
Pages (from-to)153404-1-153404-4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume69
Issue number15
DOIs
StatePublished - Apr 2004
Externally publishedYes

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