Nanoepitaxy on quasicrystal surfaces

Details Nanoepitaxy on quasicrystal surfaces Nanoepitaxy on quasicrystal surfaces

2009-10-24

arxiv.org/abs/0910.4655v1

Appl. Surf. Sci.250,1284 (2008)

Physics

Condensed Matter

Materials Science

12 pages, 5 figures. Applied Surface Science (2009) in press

Scientific paper

10.1016/j.apsusc.2009.10.028

In film growth on quasicrystalline surfaces, the epitaxy-imposed ordering cannot compete with the stable bulk phases of thick films due to absence of translational order in the structure of the substrate. Energetically, this renders the formation of crystalline domains in the native structure of the film material more favorable while their global orientation is prescribed by the quasicrystalline order. We present experimental results on the dissociative chemisorption of oxygen on the decagonal surface of Al$_{70}$Co$_{15}$Ni$_{15}$ as well as molecular-dynamics simulations of the diffusion of adatoms on the surface of the partially covered substrate.

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