Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of step stiffness and diffusion anisotropy on the meandering of a
  growing vicinal surface   We study the step meandering instability on a surface characterized by the
alternation of terraces with different properties, as in the case of Si(001).
The interplay between diffusion anisotropy and step stiffness induces a finite
wavelength instability corresponding to a meandering mode. The instability sets
in beyond a threshold value which depends on the relative magnitudes of the
destabilizing flux and the stabilizing stiffness difference. The meander
dynamics is governed by the conserved Kuramoto-Sivashinsky equation, which
display spatiotemporal coarsening.

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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
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The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom