Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structure of a superconducting vortex pinned by a screw dislocation   Spatial dependence of the magnetic field and the superconducting current in a
flux line pinned by a screw dislocation are computed. Interaction of a
superconducting vortex with the chiral-symmetry breaking elastic strain of a
screw dislocation results in a helical current along the axis of the
dislocation. It is argued that screw dislocations make impossible a force-free
arrangement of flux lines in the presence of a transport current.

23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph