Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconducting Vortex with Antiferromagnetic Core   We show that a superconducting vortex in underdoped high T_c superconductors
could have an antiferromagnetic core. This type of vortex configuration arises
as a topological solution in the recently constructed SO(5) nonlinear sigma
model and in Ginzburg-Landau theory with competing antiferromagnetic and
superconducting order parameters. Experimental detection of this type of vortex
by \mu SR and neutron scattering is proposed.

29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
3
The categories of this paper are: physics
19
The categories of this paper are: eess