Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Giant vortex states in type I superconductors simulated by
  Ginzburg-Landau equations   The quantization of magnetic flux in superconductors is usually seen as
vortices penetrating the sample. While vortices are unstable in bulk type I
superconductors, restricting the superconductor causes a variety of vortex
structures to appear. We present a systematic study of giant vortex states in
type I superconductors obtained by numerically solving the Ginzburg-Landau
equations. The size of the vortices is seen to increase with decreasing film
thickness. In type I superconductors, giant vortices appear at intermediate
thicknesses but they do not form a well-defined vortex lattice. In the thinnest
type I films, singly quantized vortices seem to be stabilized by the geometry
of the sample instead of an increase in the effective Ginzburg-Landau
parameter.

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The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an