Crystal surfaces with correlated disorder: Phase transitions between roughening and superroughening

Details Crystal surfaces with correlated disorder: Phase transitions between roughening and superroughening Crystal surfaces with correlated disorder: Phase transitions between roughening and superroughening

1995-06-08

arxiv.org/abs/cond-mat/9506037v1

Phys. Rev. Lett. 75, 4760 (1995)

Physics

Condensed Matter

13 pages with 2 figures, latex+revtex

Scientific paper

10.1103/PhysRevLett.75.4760

A theory for surface transitions in the presence of a disordered pinning potential is presented. Arbitrary disorder correlations are treated in the framework of a dynamical functional renormalization group. The roughening transition, where surface roughness and mobility behave discontinuously, is shown to turn smoothly into the continuous superroughening transition, when the range of disorder correlations is decreased. Implications for random-field $XY$-models and vortex glasses are discussed.

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