Glassy Roughness of a Crystalline Surface Upon a Disordered Substrate

Details Glassy Roughness of a Crystalline Surface Upon a Disordered Substrate Glassy Roughness of a Crystalline Surface Upon a Disordered Substrate

1994-11-12

arxiv.org/abs/cond-mat/9411048v1

Physics

Condensed Matter

12 pages (RevTeX) & 3 figures (PS) uuencoded

Scientific paper

10.1103/PhysRevLett.74.114

The discrete Gaussian model for the surface of a crystal deposited on a disordered substrate is studied by Monte Carlo simulations. A continuous transition is found from a phase with a thermally-induced roughness to a glassy one in which the roughness is driven by the disorder. The behavior of the height-height correlations is consistent with the one-step replica symmetry broken solution of the variational approximation. The results differ from the renormalization group predictions and from recent simulations of a 2D vortex-glass model which belongs to the same universality class.

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