Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coexistence of dimerization and long-range magnetic order in the quantum
  antiferromagnetic compound LiCu2O2: inelastic light scattering study   Raman scattering studies of the frustrated spin chain system
LiCu$_{2}$O$_{2}$ are reported. Two transitions into a magnetically ordered
phase (taken place at temperatures $\sim$ 9 K and $\sim$ 24 K) have been
confirmed from the analysis of optical properties of the samples.
Interestingly, two different magnetic excitations, seen at 100 and 110
cm$^{-1}$ in the magnetically ordered phase superimpose each other
independently, indicating a coherent coexistence of long-range magnetic order
and dimerization. The observed phenomenon is attributed to magnetostructural
peculiarities of LiCu$_{2}$O$_{2}$ leading to the intrinsic presence of
nonmagnetic impurities on a nanometer scale. Furthermore, magnetic impurities
play a significant role in driving the transition from an incommensurate state
to a N\'{e}el ordered one at 9 K.

17
The categories of this paper are: q-fin
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol