Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inherent spin density wave instability by vortices in superconductors
  with strong Pauli effects   A novel spin density wave (SDW) instability mechanism enhanced by vortices
under fields is proposed to explain the high field and low temperature (HL)
phase in CeCoIn$_5$. In the vortex state the strong Pauli effect and the nodal
gap conspire to enhance the momentum resolved spectral weight exclusively along
the nodal direction over the normal value, providing a favorable nesting
condition for SDW with ${\bf Q}=(2k_F, 2k_F, 0.5)$ only under high field ($H$).
Observed mysteries of the field-induced SDW confined within $H_{c2}$ are
understood consistently, such facts that ${\bf Q}$ is directed to the nodal
direction independent of $H$, SDW diminishes under tilting field from the $ab$
plane, and the SDW transition line in $(H,T)$ has a positive slope.

36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat