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Perpendicular and parallel phase separation in two-species driven diffusive lattice gases.

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This study explores particle diffusion in lattice models, revealing how electric fields drive phase separation. Stronger fields can induce parallel domain alignment through enhanced diffusion or particle interactions.

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Area of Science:

  • Statistical Mechanics
  • Condensed Matter Physics
  • Computational Physics

Background:

  • Particles driven by electric fields exhibit complex behaviors.
  • Phase separation into distinct domains is a key phenomenon in driven systems.

Purpose of the Study:

  • Investigate dynamical phase transitions in driven lattice models.
  • Understand the formation of parallel and perpendicular domains under varying electric field strengths.

Main Methods:

  • Simulation of three lattice models with two diffusing particle species.
  • Analysis of phase separation dynamics under different driving field strengths.
  • Incorporation of enhanced lateral diffusion and inter-particle interactions.

Main Results:

  • Perpendicular domain alignment observed under weak electric fields.
  • Parallel domain alignment achieved in strong driving conditions.
  • Two novel models demonstrate parallel state formation via enhanced diffusion or particle interactions.

Conclusions:

  • Driving field strength critically influences domain orientation in diffusing particle systems.
  • Particle interactions and diffusion dynamics play key roles in phase separation.
  • Findings offer insights into off-lattice phenomena like laning and freezing by heating.