Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonexponential Relaxations in a Two-Dimensional Electron System in
  Silicon   The relaxations of conductivity have been studied in a strongly disordered
two-dimensional (2D) electron system in Si after excitation far from
equilibrium by a rapid change of carrier density n_s at low temperatures T. The
dramatic and precise dependence of the relaxations on n_s and T strongly
suggests (a) the transition to a glassy phase as T->0, and (b) the Coulomb
interactions between 2D electrons play a dominant role in the observed
out-of-equilibrium dynamics.

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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
9
The categories of this paper are: nlin