Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymptotic analysis of the Gunn effect with realistic boundary
  conditions   A general asymptotic analysis of the Gunn effect in n-GaAs under general
boundary conditions for metal-semiconductor contacts is presented. Depending on
the parameter values in the boundary condition of the injecting contact,
different types of waves mediate the Gunn effect. The periodic current
oscillation typical of the Gunn effect may be caused by moving charge-monopole
accumulation or depletion layers, or by low or high-field charge-dipole
solitary waves. A new instability caused by multiple shedding of (low field)
dipole waves is found. In all cases the shape of the current oscillation is
described in detail: we show the direct relationship between its major features
(maxima, minima, plateau's, ...) and several critical currents (which depend on
the values of the contact parameters). Our results open the possibility of
measuring contact parameters from the analysis of the shape of the current
oscillation.

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The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: cs
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: math-ph
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph