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

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:125

Enthalten in:

Physical review letters - 125(2020), 17 vom: 23. Okt., Seite 178004

Sprache:

Englisch

Beteiligte Personen:

Caporusso, Claudio B [VerfasserIn]
Digregorio, Pasquale [VerfasserIn]
Levis, Demian [VerfasserIn]
Cugliandolo, Leticia F [VerfasserIn]
Gonnella, Giuseppe [VerfasserIn]

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Journal Article

Anmerkungen:

Date Revised 10.11.2020

published: Print

Citation Status PubMed-not-MEDLINE

doi:

10.1103/PhysRevLett.125.178004

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM317247492