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Area of Science:

  • Soft matter physics
  • Statistical mechanics
  • Computational physics

Background:

  • Jamming transition studies typically focus on repulsive, athermal particles.
  • Real-world complex fluids and soft solids often exhibit interparticle attraction.
  • Understanding jamming in attractive systems is crucial for material science applications.

Purpose of the Study:

  • To investigate the distinct jamming scenarios in systems with attractive interparticle forces.
  • To differentiate between continuous and first-order jamming transitions based on attraction strength.
  • To determine the universality class of attractive jamming in soft matter.

Main Methods:

  • Simulations of soft particles with an attractive shell.
  • Analysis of rigid cluster statistics.
  • Investigation of system size effects on jamming behavior.

Main Results:

  • Identified two distinct jamming scenarios: continuous for strongly attractive systems and first-order for weakly attractive systems.
  • Observed growing rigid clusters in strongly attractive systems, diverging at critical packing fraction.
  • Demonstrated that weak attraction jamming is a finite-size effect, converging to the strongly attractive universality class for larger systems.

Conclusions:

  • Attractive jamming is a generic phenomenon in complex fluids and soft solids.
  • The nature of the jamming transition (continuous vs. first-order) depends critically on interparticle attraction strength.
  • Future studies should consider interparticle attraction to accurately model jamming in real materials.