Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin and charge distribution symmetry dependence of stripe phases in
  two-dimensional electron systems confined to wide quantum wells   Measurements in clean two-dimensional electron systems confined to wide GaAs
quantum wells in which two electric subbands are occupied reveal an unexpected
rotation of the orientation of the stripe phase observed at a half-filled
Landau level. Remarkably, the reorientation is sensitive to the spin of the
half-filled Landau level and the symmetry of the charge distribution in the
quantum well.

31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph