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Phys. Rev. B 59, 4596 - 4599 (1999)

Effects of diffusional anisotropy and substrate inhomogeneity on length-distribution scaling of dimerized chains

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J. L. Iguain and H. O. Mártin *
Physics Department, School of Exact and Natural Sciences, Universidad Nacional de Mar del Plata, Deán Funes 3350, 7600 Mar del Plata, Argentina

C. M. Aldao
Institute of Materials Science and Technology (INTEMA), Universidad Nacional de Mar del Plata–CONICET, Juan B. Justo 4302, 7600 Mar del Plata, Argentina

Received 2 July 1998; revised 11 November 1998

The scaling of the island-size distributions for a model in which adatoms aggregate as dimerized chains is examined. In particular, we present the effects of diffusional anisotropy and the presence of inequivalent sites. Our results show that the exponents agree with those for simpler models. We also found that an interesting anomalous result appears for the case of unidimensional diffusion.


©1999 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.59.4596
DOI: 10.1103/PhysRevB.59.4596
PACS: 68.35.Fx, 61.43.Bn, 05.40.-a

* Associate member of the AS-ICTP (Italy).

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