Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Switching Magnetism and Superconductivity with Spin-Polarized Current in
  Iron-Based Superconductor   We have explored a new mechanism for switching magnetism and
superconductivity in a magnetically frustrated iron-based superconductor using
spin-polarized scanning tunneling microscopy (SPSTM). Our SPSTM study on single
crystal Sr$_2$VO$_3$FeAs shows that a spin-polarized tunneling current can
switch the Fe-layer magnetism into a non-trivial $C_4$ (2$\times$2) order, not
achievable by thermal excitation with unpolarized current. Our tunneling
spectroscopy study shows that the induced $C_4$ (2$\times$2) order has
characteristics of plaquette antiferromagnetic order in Fe layer and strongly
suppressed superconductivity. Also, thermal agitation beyond the bulk Fe spin
ordering temperature erases the $C_4$ state. These results suggest a new
possibility of switching local superconductivity by changing the symmetry of
magnetic order with spin-polarized and unpolarized tunneling currents in
iron-based superconductors.

17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph