Heating leads to liquid-crystal and crystalline order in a two-temperature active fluid of rods
arXiv:2105.04571 · doi:10.1103/PhysRevE.104.054610
Abstract
We report phase separation and liquid-crystal ordering induced by scalar activity in a system of Soft Repulsive Spherocylinders (SRS) of aspect ratio . Activity was introduced by increasing the temperature of half of the SRS (labeled \textit{`hot'}) while maintaining the temperature of the other half constant at a lower value (labeled \textit{`cold'}). The difference between the two temperatures scaled by the lower temperature provides a measure of the activity. Starting from different equilibrium initial phases, we find that activity leads to segregation of the hot and cold particles. Activity also drives the cold particles through a phase transition to a more ordered state and the hot particles to a state of less order compared to the initial equilibrium state. The cold components of a homogeneous isotropic (I) structure acquire nematic (N) and, at higher activity, crystalline (K) order. Similarly, the cold zone of a nematic initial state undergoes smectic (Sm) and crystal ordering above a critical value of activity while the hot component turns isotropic. We find that the hot particles occupy a larger volume and exert an extra kinetic pressure, confining, compressing and provoking an ordering transition of the cold-particle domains.
arXiv comment19 pages, 21 figures
References in corpus (39)
- Active Particles in Complex and Crowded Environments
- Collective motion
- The Mechanics and Statistics of Active Matter
- Motility-Induced Phase Separation
- Flocks, herds, and schools: A quantitative theory of flocking
- Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles
- Active Brownian Particles. From Individual to Collective Stochastic Dynamics
- Hydrodynamic fluctuations and instabilities in ordered suspensions of self-propelled particles
- Rheology of Active-Particle Suspensions
- Non-equilibrium clustering of self-propelled rods
- Large-scale collective properties of self-propelled rods
- Computational models for active matter
- Activity-induced phase separation and self-assembly in mixtures of active and passive particles
- Active nematics on a substrate: giant number fluctuations and long-time tails
- Self-assembly of catalytically active colloidal molecules: Tailoring activity through surface chemistry
- Minimal model for active nematics: quasi-long-range order and giant fluctuations
- Effective Cahn-Hilliard equation for the phase separation of active Brownian particles
- Inertial effects of self-propelled particles: from active Brownian to active Langevin motion
- Spontaneous Segregation of Self-Propelled Particles with Different Motilities
- Negative interfacial tension in phase-separated active suspensions
- Statistical mechanics for non-reciprocal forces
- Scalar Active Mixtures: The Non-Reciprocal Cahn-Hilliard Model
- Cluster phases and bubbly phase separation in active fluids: Reversal of the Ostwald process
- Swarm behavior of self-propelled rods and swimming flagella
- Motility-induced temperature difference in coexisting phases
- Binary Mixtures of Particles with Different Diffusivities Demix
- Small activity differences drive phase separation in active-passive polymer mixtures
- Phase Behavior of Bent-Core Molecules
- Active nematics are intrinsically phase-separated
- Enhanced diffusion, swelling and slow reconfiguration of a single chain in non-Gaussian active bath
- On the numerical integration of motion for rigid polyatomics: The modified quaternion approach
- Entropy production and work fluctuation relations for a single particle in active bath
- Activity induced nematic order in isotropic liquid crystals
- Phase separation and nucleation in mixtures of particles with different temperatures
- Approach to equilibrium and non-equilibrium stationary distributions of interacting many-particle systems that are coupled to different heat baths
- Emerging activity in bilayered dispersions with wake-mediated interactions
- Induced Anticlinic Ordering and Nanophase Segregation of Bow-Shaped Molecules in a Smectic Solvent
- Isotropic-nematic transition of self-propelled rods in three dimensions
- Enhanced orientational ordering induced by active yet isotropic bath