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Title: Particle-cluster aggregation with dipolar interactions
Author: Pastor-Satorras, R. (Romualdo), 1967-
Rubí Capaceti, José Miguel
Keywords: Microagregats
Química física
Equacions d'estat
Regla de les fases i equilibri
Transformacions de fase (Física estadística
Chemistry physical and theoretical
Equations of state
Phase rule and equilibrium
Phase transformations (Statistical physics)
Issue Date: 1995
Publisher: The American Physical Society
Abstract: The properties of aggregates generated from an off-lattice, two-dimensional, particle-cluster aggregation model with dipolar interparticle interactions have been investigated. The fractal dimension seems to be a monotonically decreasing function of the temperature, between a definite value close to 1 at T=0 and the limit T→∞, corresponding to diffusion-limited aggregation of particles with no interaction. Temperature and dipolar interactions are introduced by means of a Metropolis algorithm. By analyzing the orientational correlation function, and what we call the orientation probability density of the direction of the dipoles on the clusters, an ordered state is found at low temperatures. This order diminishes when the temperature increases, due to the disorder induced by the fractal geometry of the aggregates. Our study is extended to the three-dimensional case. A disordered state is found even at T=0, and a remnant order is shown when analyzing related two-dimensional correlations.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 1995, vol. 51, núm. 6, p. 5994-6003
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ISSN: 1063-651X
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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