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Phys. Rev. B 69, 153404 (2004) [4 pages]

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

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N. Ferralis1, K. Pussi2, E. J. Cox3, M. Gierer4, J. Ledieu3, I. R. Fisher5, C. J. Jenks5, M. Lindroos2, R. McGrath3, and R. D. Diehl1,*
1Department of Physics & Materials Research Institute, Penn State University, University Park, Pennsylvania 16802, USA
2Institute of Physics, Tampere University of Technology, P.O. Box 692, Tampere, Finland
3Department of Physics & Surface Science Centre, University of Liverpool, Liverpool, L69 3BX, United Kingdom
4Institute for Crystallography and Applied Mineralogy, Theresienstrasse 41, 80333 München, Germany
5Ames Laboratory and Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA

Received 28 January 2004; published 6 April 2004

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.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.153404
DOI:
10.1103/PhysRevB.69.153404
PACS:
61.44.Br, 61.14.Hg, 68.35.Bs

*Electronic address: rdiehl@psu.edu

 
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