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Spatial Separation of Molecular Conformers and Clusters
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Competition between lanes and transient jammed clusters in driven binary mixtures.

Honghao Yu1, Robert L Jack1,2

  • 1Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom.

Physical Review. E
|March 16, 2024
PubMed
Summary
This summary is machine-generated.

Mixtures of oppositely driven particles form lanes and transient jammed clusters. Macroscopic demixing occurs as a crossover, not a critical transition, due to cluster disruption of order.

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Area of Science:

  • Statistical Mechanics
  • Soft Matter Physics
  • Complex Systems

Background:

  • Driven particle systems exhibit rich nonequilibrium phenomena.
  • Understanding pattern formation and phase separation is crucial in statistical physics.
  • Oppositely driven mixtures present unique challenges due to competing forces.

Purpose of the Study:

  • To investigate the nonequilibrium steady states of oppositely driven particle mixtures.
  • To analyze the interplay between lane formation and transient jamming.
  • To understand the mechanism of macroscopic demixing perpendicular to the drive.

Main Methods:

  • Theoretical analysis of particle dynamics in mixtures.
  • Simulation of nonequilibrium steady states.
  • Finite-size scaling analysis to identify critical phenomena.

Main Results:

  • Nonequilibrium steady states form lanes parallel to the applied drive.
  • Transient jammed clusters, where particles are temporarily immobilized, coexist with lanes.
  • Macroscopic demixing perpendicular to the drive is observed as a crossover, not a critical transition.

Conclusions:

  • Transient jammed clusters disrupt long-ranged order, preventing a true critical demixing transition.
  • The observed demixing is a finite-size effect attributed to the dynamic nature of clusters.
  • This work clarifies the role of dynamic heterogeneity in phase separation of driven systems.