Universality classes in anisotropic non-equilibrium growth models
arXiv:cond-mat/0108306 · doi:10.1209/epl/i2002-00175-8
Abstract
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.
4 pages, revtex, 2 figures (eps files enclosed)