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Ground states of ultrasoft particles with attractions: A genetic algorithm approach

  • Heinrich Heine University Düsseldorf
  • Institut für Physik, Johannes-Gutenberg-Universität-Mainz, D-55099 Mainz, Germany

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We analyse in detail the ground-state structure of model systems of athermal star polymers with an additional, tunable attraction that may result from dispersion or depletion forces. To perform a free, unbiased search in the space spanned by the crystal parameters, we employ genetic algorithms, which are enhanced with respect to previous versions in their ability to find stable structures that occupy very narrow basins of attraction in the energy landscape. Application of this method brings about a very large variety of ground states for star polymers with attractions, in particular for the case of intermediate functionalities and strong, short-range attractive forces.

Original languageEnglish
JournalMolecular Physics
Volume107
Issue number4-6
Pages (from-to)523-534
Number of pages12
ISSN0026-8976
DOIs
Publication statusPublished - Feb 2009
Externally publishedYes

Keywords

  • Genetic algorithms
  • Phase behaviour
  • Soft colloids
  • Soft matter
  • Statistical mechanics

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