Phase transitions and steady-state microstructures in a two-temperature lattice-gas model with mobile active impurities

Jonas Rosager Henriksen, Mads Christian Sabra, Ole G. Mouritsen

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Abstract

The nonequilibrium, steady-state phase transitions and the structure of the different phases of a two-dimensional system with two thermodynamic temperatures are studied via a simple lattice-gas model with mobile active impurities ("hot/cold spots'') whose activity is controlled by an external drive. The properties of the model are calculated by Monte Carlo computer-simulation techniques. The two temperatures and the external drive on the system lead to a rich phase diagram including regions of microstructured phases in addition to macroscopically ordered (phase-separated) and disordered phases. Depending on the temperatures, microstructured phases of both lamellar and droplet symmetry arise, described by a length scale that is determined by the characteristic temperature controlling the diffusive motion of the active impurities.
Original languageEnglish
JournalPhysical Review E. Statistical, Nonlinear, and Soft Matter Physics
Volume62
Issue number5
Pages (from-to)7070-7076
ISSN1063-651X
DOIs
Publication statusPublished - 2000

Bibliographical note

Copyright (2000) American Physical Society

Keywords

  • LIPID-MEMBRANES
  • MONTE-CARLO
  • NONEQUILIBRIUM SYSTEMS
  • SEPARATION
  • REACTIVE BINARY-MIXTURES
  • MOLECULAR-DYNAMICS SIMULATIONS
  • SHAPE FLUCTUATIONS
  • 2-TEMPERATURE
  • KINETIC ISING-MODEL
  • COMPETING DYNAMICS

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