The profile of a decaying crystalline cone

Details The profile of a decaying crystalline cone The profile of a decaying crystalline cone

1999-05-04

arxiv.org/abs/cond-mat/9905031v1

Physics

Condensed Matter

Materials Science

25 pages, 18 postscript figures

Scientific paper

10.1103/PhysRevB.60.5946

The decay of a crystalline cone below the roughening transition is studied. We consider local mass transport through surface diffusion, focusing on the two cases of diffusion limited and attachment-detachment limited step kinetics. In both cases, we describe the decay kinetics in terms of step flow models. Numerical simulations of the models indicate that in the attachment-detachment limited case the system undergoes a step bunching instability if the repulsive interactions between steps are weak. Such an instability does not occur in the diffusion limited case. In stable cases the height profile, h(r,t), is flat at radii r

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