title: Complex phase ordering of the one-dimensional Heisenberg model with conserved order parameter.
abstract: We study the phase-ordering kinetics of the one-dimensional Heisenberg model with conserved order parameter by means of scaling arguments and numerical simulations. We find a rich dynamical pattern with a regime characterized by two distinct growing lengths. Spins are found to be coplanar over regions of a typical size LV(t), while inside these regions smooth rotations associated to a smaller length LC(t) are observed. Two different and coexisting ordering mechanisms are associated to these lengths, leading to different growth laws LV(t) approximately t1/3 and LC(t) approximately t1/4 violating dynamical scaling.
authors.affiliation: Dipartimento di Fisica and INFN, Università di Parma, Parco Area delle Scienze 7/A, I-423100 Parma, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Burioni
authors.forename: F
authors.initials: F
authors.lastname: Corberi
authors.forename: A
authors.initials: A
authors.lastname: Vezzani