INVESTIGADORES
RAMIREZ PASTOR antonio Jose
artículos
Título:
Diffusion- limited aggregates grown on nonuniform substrates
Autor/es:
CORNETTE V.; CENTRES P. M.; RAMIREZ PASTOR A. J.; NIETO F.
Revista:
PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 392 p. 5879 - 5887
ISSN:
0378-4371
Resumen:
In the present paper, patterns of
diffusion-limited aggregation (DLA) grown on nonuniform substrates are
investigated by means of Monte Carlo simulations. We consider a nonuniform
substrate as the largest percolation cluster of dropped particles with different structures and forms that occupy
more than a single site on the lattice. The aggregates are grown on such clusters, in the
range the concentration, p, from the percolation threshold, pc up to the jamming
coverage, pj. At the percolation threshold, the aggregates are asymmetrical and the branches
are relatively few. However, for larger values of p, the patterns change gradually to a pure
DLA. Tiny qualitative differences in this behavior are observed for different k sizes.
Correspondingly, the fractal dimension of the aggregates increases as p raises in the same
range pc ≤ p ≤ pj. This behavior is analyzed and discussed in the
framework of the existing theoretical approaches.