Dresden 2017 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 55: Posters - Soft Matter, Glasses

DY 55.4: Poster

Donnerstag, 23. März 2017, 17:00–19:30, P1A

Phase Field Crystal Models of Colloidal Quasicrystals — •Benedikt Decker and Michael Schmiedeberg — Institut für Theoretische Physik 1, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr. 7, 91058 Erlangen

Phase field crystal models that employ a Swift-Hohenberg-like free energy are widely used to explore periodic pattern formation [1]. Recently, the phase field crystal model has been modified by adding a second preferred length scale, such that stable quasicrystalline structures are obtained [2,3].

In addition, there are other ways to realize colloidal quasicrystals: A large variety of complex self-organized structures are observed in systems with patchy colloids. Patchy colloids usually carry attractive sites, such that the interaction depends on their orientation. In order to study how such preferred binding angles influence the self-assembly, we construct and explore a phase field crystal model for patchy colloids. Similar to the case of liquid crystals [4], the free energy in such a model depends on order parameters that denote the density as well as the degree and angle of orientation of the particles.

[1] K.R. Elder et al., Phys. Rev. Lett. 88, 245701 (2002).
[2] J. Rottler et al., J. Phys. Condens. Matter 24,135002 (2012).
[3] C.V. Achim et al., Phys. Rev. Lett. 112, 255501 (2014).
[4] C.V. Achim et al., Phys. Rev. E 83, 061712 (2011).