Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ordered phases in spin-Peierls systems   The microscopic description of spin-Peierls substances is discussed.
Particular attention is paid to the ordered (dimerised and incommensurably
modulated) phases. Important points are the adiabatic and the antiadiabatic
approach, generic soliton forms, elastic and magnetic interchain couplings. The
wealth and the accuracy of experimental information collected for the first
inorganic spin-Peierls substance CuGeO_3 motivates this work.

22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph