Levis, D. ; Liebchen, B. (2019)
Simultaneous phase separation and pattern formation in chiral active mixtures.
In: Phys. Rev. E, 100
doi: 10.1103/PhysRevE.100.012406
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Chiral active particles, or self-propelled circle swimmers, from sperm cells to asymmetric Janus colloids, form a rich set of patterns, which are different from those seen in linear swimmers. Such patterns have mainly been explored for identical circle swimmers, while real-world circle swimmers typically possess a frequency distribution. Here we show that even the simplest mixture of (velocity-aligning) circle swimmers with two different frequencies hosts a complex world of superstructures: The most remarkable example comprises a microflock pattern, formed in one species, while the other species phase separates and forms a macrocluster, coexisting with a gas phase. Here one species microphase separates and selects a characteristic length scale, whereas the other one macrophase separates and selects a density. A second notable example, here occurring in an isotropic system, are patterns comprising two different characteristic length scales, which are controllable via frequency and swimming speed of the individual particles.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Levis, D. ; Liebchen, B. |
| Art des Eintrags: | Bibliographie |
| Titel: | Simultaneous phase separation and pattern formation in chiral active mixtures |
| Sprache: | Englisch |
| Publikationsjahr: | 16 Juli 2019 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Phys. Rev. E |
| Jahrgang/Volume einer Zeitschrift: | 100 |
| DOI: | 10.1103/PhysRevE.100.012406 |
| Kurzbeschreibung (Abstract): | Chiral active particles, or self-propelled circle swimmers, from sperm cells to asymmetric Janus colloids, form a rich set of patterns, which are different from those seen in linear swimmers. Such patterns have mainly been explored for identical circle swimmers, while real-world circle swimmers typically possess a frequency distribution. Here we show that even the simplest mixture of (velocity-aligning) circle swimmers with two different frequencies hosts a complex world of superstructures: The most remarkable example comprises a microflock pattern, formed in one species, while the other species phase separates and forms a macrocluster, coexisting with a gas phase. Here one species microphase separates and selects a characteristic length scale, whereas the other one macrophase separates and selects a density. A second notable example, here occurring in an isotropic system, are patterns comprising two different characteristic length scales, which are controllable via frequency and swimming speed of the individual particles. |
| Freie Schlagworte: | publiziert |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) |
| Hinterlegungsdatum: | 09 Aug 2019 07:50 |
| Letzte Änderung: | 19 Aug 2020 10:30 |
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