Relaxation of Surface Profiles by Evaporation Dynamics

Details Relaxation of Surface Profiles by Evaporation Dynamics Relaxation of Surface Profiles by Evaporation Dynamics

1997-07-18

arxiv.org/abs/cond-mat/9707192v1

Physics

Condensed Matter

6 pages, Revtex, 5 Postscript figures, to appear in PRB 15, October 1997

Scientific paper

10.1103/PhysRevB.56.12499

We present simulations of the relaxation towards equilibrium of one dimensional steps and sinusoidal grooves imprinted on a surface below its roughening transition. We use a generalization of the hypercube stacking model of Forrest and Tang, that allows for temperature dependent next-nearest-neighbor interactions. For the step geometry the results at T=0 agree well with the t^(1/4) prediction of continuum theory for the spreading of the step. In the case of periodic profiles we modify the mobility for the tips of the profile and find the approximate solution of the resulting free boundary problem to be in reasonable agreement with the T=0 simulations.

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