In recent computer simulations of a simple monatomic system interacting via the Dzugutov pair potential, freezing of the fluid into an equilibrium dodecagonal quasicrystal has been reported [M. Dzugutov, Phys. Rev. Lett. 70, 2924 (1993)]. Here, using a combination of molecular dynamics simulation and thermodynamic perturbation theory, we conduct a detailed analysis of the relative stabilities of solid-phase structures of the Dzugutov-potential system. At low pressures, the most stable structure is found to be a bcc crystal, which gives way at higher pressures to a fcc crystal. Although a dodecagonal quasicrystal and a sigma-phase crystal compete with the bcc crystal for stability, they always remain metastable.
Solid-phase structures of the dzugutov pair potential.
Published 2000 in Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
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- Publication year
2000
- Venue
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
- Publication date
2000-03-09
- Fields of study
Materials Science, Medicine, Physics
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- External record
- Source metadata
Semantic Scholar, PubMed
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