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Entropy versus energy : the phase behavior of a hard-disk mixture in a periodic external potential

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2008

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-120730
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https://doi.org/10.1103/PhysRevE.76.061503
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Physical Review E. 2008, 76, 061503. Available under: doi: 10.1103/PhysRevE.76.061503

Zusammenfassung

The phase behavior of a 50% binary hard-disk mixture with diameter ratio sigma(B)/sigma(A)=0.414, which is exposed to a one-dimensional periodic potential, is examined via Monte Carlo simulations. We find an induced structural crossover in the modulated liquid. At higher densities, depending on the strength of the external potential, the system exhibits a tunable demixing transition, followed by fluid-solid coexistence of an equimolar mixture with the S-1(AB) square lattice. We find a decoupled melting of the sublattices of the S-1(AB) lattice. The melting of the small-component sublattice perpendicular to the external potential minima leads to fissuring in the large-component sublattice.

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530 Physik

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colloidal crystals, patterned surfaces, 2 dimensions, crystallization, suspensions

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ISO 690FRANZRAHE, Kerstin, Peter NIELABA, 2008. Entropy versus energy : the phase behavior of a hard-disk mixture in a periodic external potential. In: Physical Review E. 2008, 76, 061503. Available under: doi: 10.1103/PhysRevE.76.061503
BibTex
@article{Franzrahe2008Entro-964,
  year={2008},
  doi={10.1103/PhysRevE.76.061503},
  title={Entropy versus energy : the phase behavior of a hard-disk mixture in a periodic external potential},
  volume={76},
  journal={Physical Review E},
  author={Franzrahe, Kerstin and Nielaba, Peter},
  note={Article Number: 061503}
}
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