Universality classes in anisotropic non-equilibrium growth models

Details Universality classes in anisotropic non-equilibrium growth models Universality classes in anisotropic non-equilibrium growth models

2001-08-20

arxiv.org/abs/cond-mat/0108306v1

Europhys. Lett. 59 (2002) 655

Physics

Condensed Matter

Statistical Mechanics

4 pages, revtex, 2 figures (eps files enclosed)

Scientific paper

10.1209/epl/i2002-00175-8

We study the effect of generic spatial anisotropies on the scaling behavior in the Kardar-Parisi-Zhang equation. In contrast to its "conserved" variants, anisotropic perturbations are found to be relevant in d > 2 dimensions, leading to rich phenomena that include novel universality classes and the possibility of first-order phase transitions and multicritical behavior. These results question the presumed scaling universality in the strong-coupling rough phase, and shed further light on the connection with generalized driven diffusive systems.

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