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Nucleation and growth of a quasicrystalline monolayer: Bi adsorption on the fivefold surface of i-Al70Pd21Mn9
Physical Review B
  • J. A. Smerdon, University of Liverpool
  • J. K. Parle, University of Liverpool
  • L. H. Wearing, University of Liverpool
  • Thomas A. Lograsso, Iowa State University
  • A. R. Ross, Iowa State University
  • R. McGrath, University of Liverpool
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Scanning tunneling microscopy has been used to study the formation of a Bi monolayer deposited on the fivefold surface of i-Al70Pd21Mn9. Upon deposition of low submonolayer coverages, the nucleation of pentagonal clusters of Bi adatoms of edge length 4.9 Å is observed. The clusters have a common orientation leading to a film with fivefold symmetry. By inspection of images where both the underlying surface and the Bi atoms are resolved, the pentagonal clusters are proposed to nucleate on pseudo-Mackay clusters truncated such that a Mn atom lies centrally in the surface plane. The density of these sites is sufficient to form a quasiperiodic framework, and subsequent adsorption of Bi atoms ultimately leads to the formation of a quasicrystalline monolayer. The suggested nucleation site is different from that proposed on the basis of recent density-functional theory calculations.

This article is from Physical Review B 78 (2008): 075407, doi:10.1103/PhysRevB.78.075407.

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American Physical Society
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J. A. Smerdon, J. K. Parle, L. H. Wearing, Thomas A. Lograsso, et al.. "Nucleation and growth of a quasicrystalline monolayer: Bi adsorption on the fivefold surface of i-Al70Pd21Mn9" Physical Review B Vol. 78 Iss. 7 (2008) p. 075407
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