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Use of periodic approximants in a dynamical LEED study of the quasicrystalline tenfold surface of decagonal Al-Ni-Co

Publication ,  Journal Article
Pussi, K; Ferralis, N; Mihalkovic, M; Widom, M; Curtarolo, S; Gierer, M; Jenks, CJ; Canfield, P; Fisher, IR; Diehl, RD
Published in: Physical Review B - Condensed Matter and Materials Physics
May 24, 2006

The determination of quasicrystal (QC) surface structures is a challenge to current surface structure techniques. Low-energy electron diffraction (LEED) is the primary technique for the determination of periodic surface structures, but application of dynamical LEED to quasicrystals requires the use of many approximations. In this study, two different approaches were used to apply dynamical LEED to the structure of the tenfold surface of decagonal Al73 Ni10 Co17. One method (method 1) involves the use of a quasicrystalline model along with approximations that average over the composition and local geometries. The other method (method 2) uses periodic models that approximate the actual local QC structure (approximants) in more exact, atomistic calculations. Although the results using the two methods were consistent, the results of the approximant analysis (method 2) suggested a different way to apply the approximations in method 1, resulting in a better fit between experimental and calculated beams. Thus, periodic approximant structure models can provide a simpler and more efficient method for the determination of local geometries in QC surfaces, and may also facilitate analyses using quasicrystal models. © 2006 The American Physical Society.

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Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

May 24, 2006

Volume

73

Issue

18

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences
 

Citation

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Pussi, K., Ferralis, N., Mihalkovic, M., Widom, M., Curtarolo, S., Gierer, M., … Diehl, R. D. (2006). Use of periodic approximants in a dynamical LEED study of the quasicrystalline tenfold surface of decagonal Al-Ni-Co. Physical Review B - Condensed Matter and Materials Physics, 73(18). https://doi.org/10.1103/PhysRevB.73.184203
Pussi, K., N. Ferralis, M. Mihalkovic, M. Widom, S. Curtarolo, M. Gierer, C. J. Jenks, P. Canfield, I. R. Fisher, and R. D. Diehl. “Use of periodic approximants in a dynamical LEED study of the quasicrystalline tenfold surface of decagonal Al-Ni-Co.” Physical Review B - Condensed Matter and Materials Physics 73, no. 18 (May 24, 2006). https://doi.org/10.1103/PhysRevB.73.184203.
Pussi K, Ferralis N, Mihalkovic M, Widom M, Curtarolo S, Gierer M, et al. Use of periodic approximants in a dynamical LEED study of the quasicrystalline tenfold surface of decagonal Al-Ni-Co. Physical Review B - Condensed Matter and Materials Physics. 2006 May 24;73(18).
Pussi, K., et al. “Use of periodic approximants in a dynamical LEED study of the quasicrystalline tenfold surface of decagonal Al-Ni-Co.” Physical Review B - Condensed Matter and Materials Physics, vol. 73, no. 18, May 2006. Scopus, doi:10.1103/PhysRevB.73.184203.
Pussi K, Ferralis N, Mihalkovic M, Widom M, Curtarolo S, Gierer M, Jenks CJ, Canfield P, Fisher IR, Diehl RD. Use of periodic approximants in a dynamical LEED study of the quasicrystalline tenfold surface of decagonal Al-Ni-Co. Physical Review B - Condensed Matter and Materials Physics. 2006 May 24;73(18).

Published In

Physical Review B - Condensed Matter and Materials Physics

DOI

EISSN

1550-235X

ISSN

1098-0121

Publication Date

May 24, 2006

Volume

73

Issue

18

Related Subject Headings

  • Fluids & Plasmas
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences