Now showing items 1-20 of 31

    • Comment on "Two time scales and violation of the fluctuation-dissipation theorem in a finite dimensional model for structural glasses" : reply 

      Ricci-Tersenghi, Federico; Parisi, Giorgio; Stariolo, Daniel Adrian; Arenzon, Jeferson Jacob (2001) [Journal article]
    • Domain-size heterogeneity in the Ising model : geometrical and thermal transition 

      Rocha, André Rodrigues de la; Oliveira, Paulo Murilo Castro de; Arenzon, Jeferson Jacob (2015) [Journal article]
      A measure of cluster size heterogeneity (H), introduced by Lee et al. [Phys. Rev. E 84, 020101 (2011)] in the context of explosive percolation, was recently applied to random percolation and to domains of parallel spins ...
    • Dynamical cluster size heterogeneity 

      Lopes, Amanda de Azevedo; Rocha, André Rodrigues de la; Oliveira, Paulo Murilo Castro de; Arenzon, Jeferson Jacob (2020) [Journal article]
      Only recently has the essential role of the percolation critical point been considered on the dynamical properties of connected regions of aligned spins (domains) after a sudden temperature quench. In equilibrium, it is ...
    • Dynamics of the frustrated ising lattice gas 

      Arenzon, Jeferson Jacob; Ricci-Tersenghi, Federico; Stariolo, Daniel Adrian (2000) [Journal article]
      The dynamical properties of a three-dimensional model glass, the frustrated Ising lattice gas (FILG), are studied by Monte Carlo simulations. We present results of compression experiments, where the chemical potential is ...
    • Event-driven Monte Carlo : exact dynamics at all time scales for discrete-variable models 

      Mendoza Coto, Alejandro; Díaz Méndez, Rogelio; Pupillo, Guido (2016) [Journal article]
      We present an algorithm for the simulation of the exact real-time dynamics of classical many-body systems with discrete energy levels. In the same spirit of kinetic Monte Carlo methods, a stochastic solution of the master ...
    • Geometry of phase separation 

      Sicilia, Alberto; Sarrazin, Yoann; Arenzon, Jeferson Jacob; Bray, Alan J.; Cugliandolo, Leticia F. (2009) [Journal article]
      We study the domain geometry during spinodal decomposition of a 50:50 binary mixture in two dimensions. Extending arguments developed to treat nonconserved coarsening, we obtain approximate analytic results for the ...
    • Interplay between coarsening and nucleation in an Ising model with dipolar interactions 

      Cannas, Sergio A.; Michelon, Mateus Fontana; Stariolo, Daniel Adrian; Tamarit, Francisco A. (2008) [Journal article]
      We study the dynamical behavior of a square lattice Ising model with exchange and dipolar interactions by means of Monte Carlo simulations. After a sudden quench to low temperatures, we find that the system may undergo a ...
    • Inverse transition in the dipolar frustrated Ising ferromagnet : the role of domain walls 

      Velasque, Luciana Araújo; Stariolo, Daniel Adrian; Billoni, Orlando Vito (2014) [Journal article]
      We present a theoretical study aimed at elucidating the origin of the inverse symmetry-breaking transition observed in ultrathinmagnetic films with perpendicular anisotropy.We study the behavior of the dipolar frustrated ...
    • Ising nematic phase in ultrathin magnetic films : a Monte Carlo study 

      Cannas, Sergio A.; Michelon, Mateus Fontana; Stariolo, Daniel Adrian; Tamarit, Francisco A. (2006) [Journal article]
      We study the critical properties of a two-dimensional Ising model with competing ferromagnetic exchange and dipolar interactions, which models an ultrathin magnetic film with high out-of-plane anisotropy in the monolayer ...
    • Kinetic model for a polmer in one dimension 

      Martins, Jose Arthur; Stilck, Jurgen F. (1995) [Journal article]
      We consider a model for a directed polymer on a one-dimensional lattice of width 2, with attractive interactions between monomers that occupy first-neighbor sites on the lattice and are not consecutive along the chain. We ...
    • Langevin dynamics of fluctuation-induced first-order phase transitions : self-consistent Hartree approximation 

      Mulet, Roberto; Stariolo, Daniel Adrian (2007) [Journal article]
      The Langevin dynamics of a system with a scalar-order parameter exhibiting a fluctuation-induced firstorder phase transition is solved within the self-consistent Hartree approximation. Competition between interactions on ...
    • Liquid polymorphism, order-disorder transitions and anomalous behavior : a Monte Carlo study of the Bell-Lavis model for water 

      Fiore, Carlos Eduardo; Szortyka, Marcia Martins; Barbosa, Marcia Cristina Bernardes; Henriques, Vera Bohomoletz (2009) [Journal article]
      The Bell–Lavis model for liquid water is investigated through numerical simulations. The lattice-gas model on a triangular lattice presents orientational states and is known to present a highly bonded low density phase and ...
    • Local persistence and blocking in the two-dimensional Blume-Capel model 

      Silva, Roberto da; Dahmen, Silvio Renato (2004) [Journal article]
    • Mean field theory of the ising random-amisotropy-axis model in the large-component limit 

      Dominguez, David Renato Carreta; Theumann, Walter Karl (1993) [Journal article]
      The lsing random-anisotropy-axis model with additional noncubic anisotropy is investigated in mean-field theory in the limit p → ∞ for p-component random vectors on a lattice of N sites. The effects of anisotropy for ...
    • Microscopic approach to orientational order of domain walls 

      Barci, Daniel G.; Stariolo, Daniel Adrian (2011) [Journal article]
      We develop a fully microscopic, statistical mechanics approach to study phase transitions in Ising systems with competing interactions at different scales. Our aim is to consider orientational and positional order parameters ...
    • Nematic phase in the J1-J2 square-lattice Ising model in an external field 

      Guerrero Duymovic, Alejandra Isabel; Stariolo, Daniel Adrian; Almarza, Noé G. (2015) [Journal article]
      The J1-J2 Ising model in the square lattice in the presence of an external field is studied by two approaches: the cluster variation method (CVM) and Monte Carlo simulations. The use of the CVM in the square approximation ...
    • Nematic phase in two-dimensional frustrated systems with power-law decaying interactions 

      Barci, Daniel G.; Ribeiro, Leonardo Rodrigues; Stariolo, Daniel Adrian (2013) [Journal article]
      We address the problem of orientational order in frustrated interaction systems as a function of the relative range of the competing interactions. We study a spin model Hamiltonian with short-range ferromagnetic interaction ...
    • New ordered phases in a class of generalized XY models 

      Poderoso, Fábio Campos; Arenzon, Jeferson Jacob; Levin, Yan (2011) [Journal article]
      It is well known that the 2D XY model exhibits an unusual infinite order phase transition belonging to the Kosterlitz-Thouless (KT) universality class. Introduction of a nematic coupling into the XY Hamiltonian leads to ...
    • Nonequilibrium critical dynamics of the two-dimensional Ashkin-Teller model at the Baxter line 

      Fernandes, Henrique Almeida; Silva, Roberto da; Caparica, Álvaro de Almeida; Felício, José Roberto Drugovich de (2017) [Journal article]
      We investigate the short-time universal behavior of the two-dimensional Ashkin-Teller model at the Baxter line by performing time-dependent Monte Carlo simulations. First, as preparatory results, we obtain the critical ...
    • Off-equilibrium dynamics of the frustrated Ising lattice gas 

      Stariolo, Daniel Adrian; Arenzon, Jeferson Jacob (1999) [Journal article]
      We study by means of Monte Carlo simulations the off-equilibrium properties of a model glass, the frustrated Ising lattice gas in three dimensions. We have computed typical two times quantities, such as densitydensity ...