Noble gas films on a decagonal AlNiCo quasicrystal
arXiv:cond-mat/0610642 · doi:10.1088/0953-8984/19/1/016007
Abstract
Thermodynamic properties of Ne, Ar, Kr, and Xe adsorbed on an Al-Ni-Co quasicrystalline surface (QC) are studied with Grand Canonical Monte Carlo by employing Lennard-Jones interactions with parameter values derived from experiments and traditional combining rules. In all the gas/QC systems, a layer-by-layer film growth is observed at low temperature. The monolayers have regular epitaxial fivefold arrangements which evolve toward sixfold close-packed structures as the pressure is increased. The final states can contain either considerable or negligible amounts of defects. In the latter case, there occurs a structural transition from five to sixfold symmetry which can be described by introducing an order parameter, whose evolution characterizes the transition to be continuous or discontinuous as in the case of Xe/QC (first-order transition with associated latent heat). By simulating fictitious noble gases, we find that the existence of the transition is correlated with the size mismatch between adsorbate and substrate's characteristic lengths. A simple rule is proposed to predict the phenomenon.
arXiv comment19 pages. 8 figures. (color figures can be seen at http://alpha.mems.duke.edu/wahyu/ or http://www.iop.org/EJ/abstract/0953-8984/19/1/016007/)
References in corpus (7)
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Cited by in corpus (7)
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- Formation of a quasicrystalline Pb monolayer on the ten-fold surface of the decagonal Al-Ni-Co quasicrystal
- Deposition of Atoms on a Quasicrystalline Substrate: Molecular-Dynamics Study in 3 Dimensions
- Bulk and surface structure of the clean and adsorbate-covered decagonal Al-Co-Ni quasicrystal
- Ordering of rare gas films on a decagonal Al-Ni-Co quasicrystal
- Structures and topological transitions of hydrocarbon films on quasicrystalline surfaces
- Nanoepitaxy on quasicrystal surfaces