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How do quasicrystals grow?

Aaron S Keys1, Sharon C Glotzer

  • 1Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA.

Physical Review Letters
|February 1, 2008
PubMed
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Quasicrystal growth depends on incorporating atoms with minimal rearrangement. Stable icosahedral clusters are assimilated, explaining long-range aperiodicity in dodecagonal quasicrystals.

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Crystallography

Background:

  • Quasicrystals exhibit long-range order without translational periodicity.
  • Understanding quasicrystal formation mechanisms is crucial for materials design.

Purpose of the Study:

  • To elucidate the atomic-level mechanisms governing the aperiodic growth of quasicrystals.
  • To identify the role of specific atomic clusters in quasicrystal formation.

Main Methods:

  • Molecular dynamics simulations were employed to model quasicrystal nucleation and growth.
  • Analysis focused on atom incorporation pathways and structural rearrangements.

Main Results:

  • Aperiodic growth is controlled by the efficient incorporation of kinetically trapped atoms.

Related Experiment Videos

  • The dodecagonal quasicrystal studied assimilates stable icosahedral clusters.
  • Minimal atomic rearrangement during incorporation facilitates growth.

    • Conclusions:

    • Local atomic interactions and cluster assimilation are key to long-range quasicrystal aperiodicity.
    • The findings provide a mechanistic link between atomic processes and macroscopic quasicrystal structure.