Motility-Induced Microphase and Macrophase Separation in a Two-Dimensional Active Brownian Particle System
As a result of nonequilibrium forces, purely repulsive self-propelled particles undergo macrophase separation between a dense and a dilute phase. We present a thorough study of the ordering kinetics of such motility-induced phase separation (MIPS) in active Brownian particles in two dimensions, and we show that it is generically accompanied by microphase separation. The growth of the dense phase follows a law akin to the one of liquid-gas phase separation. However, it is made of a mosaic of hexatic microdomains whose size does not coarsen indefinitely, leaving behind a network of extended topological defects from which microscopic dilute bubbles arise. The characteristic length of these finite-size structures increases with activity, independently of the choice of initial conditions.
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2020 |
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Erschienen: |
2020 |
Enthalten in: |
Zur Gesamtaufnahme - volume:125 |
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Enthalten in: |
Physical review letters - 125(2020), 17 vom: 23. Okt., Seite 178004 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Caporusso, Claudio B [VerfasserIn] |
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Anmerkungen: |
Date Revised 10.11.2020 published: Print Citation Status PubMed-not-MEDLINE |
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doi: |
10.1103/PhysRevLett.125.178004 |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM317247492 |
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520 | |a As a result of nonequilibrium forces, purely repulsive self-propelled particles undergo macrophase separation between a dense and a dilute phase. We present a thorough study of the ordering kinetics of such motility-induced phase separation (MIPS) in active Brownian particles in two dimensions, and we show that it is generically accompanied by microphase separation. The growth of the dense phase follows a law akin to the one of liquid-gas phase separation. However, it is made of a mosaic of hexatic microdomains whose size does not coarsen indefinitely, leaving behind a network of extended topological defects from which microscopic dilute bubbles arise. The characteristic length of these finite-size structures increases with activity, independently of the choice of initial conditions | ||
650 | 4 | |a Journal Article | |
700 | 1 | |a Digregorio, Pasquale |e verfasserin |4 aut | |
700 | 1 | |a Levis, Demian |e verfasserin |4 aut | |
700 | 1 | |a Cugliandolo, Leticia F |e verfasserin |4 aut | |
700 | 1 | |a Gonnella, Giuseppe |e verfasserin |4 aut | |
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