Micro-phase separation in two dimensional suspensions of self-propelled spheres and dumbbells.
We use numerical simulations to study the phase behavior of self-propelled spherical and dumbbellar particles interacting via micro-phase separation inducing potentials. Our results indicate that under the appropriate conditions, it is possible to drive the formation of two new active states; a spinning cluster crystal, i.e. an ordered mesoscopic phase having finite size spinning crystallites as lattice sites, and a fluid of living clusters, i.e. a two dimensional fluid where each "particle" is a finite size living cluster. We discuss the dynamics of these phases and suggest ways of extending their stability under a wide range of active forces.
Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027, USA. ac2822@columbia.edu.
Clarion
C
Tung
Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027, USA. ac2822@columbia.edu.
Joseph
J
Harder
Departamento de Fisica Aplicada I, Facultad de Ciencias Fisicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.
C
C
Valeriani
Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027, USA. ac2822@columbia.edu.
A
A
Cacciuto