title: Coarsening and percolation in a disordered ferromagnet.
abstract: By studying numerically the phase-ordering kinetics of a two-dimensional ferromagnetic Ising model with quenched disorder (either random bonds or random fields) we show that a critical percolation structure forms at an early stage. This structure is then rendered more and more compact by the ensuing coarsening process. Our results are compared to the nondisordered case, where a similar phenomenon is observed, and they are interpreted within a dynamical scaling framework.
authors.affiliation: Dipartimento di Fisica "E. R. Caianiello," Università di Salerno, 132 Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy.|INFN, Gruppo Collegato di Salerno, and CNISM, Unità di Salerno, Università di Salerno, 132 Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy.
authors.forename: Federico
authors.initials: F
authors.lastname: Corberi
authors.affiliation: Laboratoire de Physique Théorique et Hautes Energies, Université Pierre et Marie Curie, Sorbonne Universités, 4 Place Jussieu, 75252 Paris Cedex 05, France.
authors.forename: Leticia F
authors.initials: LF
authors.lastname: Cugliandolo
authors.affiliation: Dipartimento di Fisica "E. R. Caianiello," Università di Salerno, 132 Via Giovanni Paolo II, 84084 Fisciano, Salerno, Italy.|Laboratoire de Physique Théorique et Hautes Energies, Université Pierre et Marie Curie, Sorbonne Universités, 4 Place Jussieu, 75252 Paris Cedex 05, France.
authors.forename: Ferdinando
authors.initials: F
authors.lastname: Insalata
authors.affiliation: Laboratoire de Physique Théorique et Hautes Energies, Université Pierre et Marie Curie, Sorbonne Universités, 4 Place Jussieu, 75252 Paris Cedex 05, France.
authors.forename: Marco
authors.initials: M
authors.lastname: Picco