Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determinative Role of the Jahn-Teller Disorder in the Raman Scattering
  of Mixed-Valence Manganites   The mixed-valence perovskitelike manganites are characterized by unique
interrelation of Jahn-Teller distortions, electric and magnetic properties. The
Jahn-Teller distortion follows the Mn(3+)->Mn(4+) charge transfer with some
delay. Its development depends on the lifetime of Mn in (3+) state, governed by
the Mn(4+)/Mn(3+) ratio and magnetic correlation. The non-coherence of
Jahn-Teller distortions in orthorhombic mixed-valence manganites and
rhombohedral RMnO3 (R = rare earth) results in oxygen disorder. We demonstrate
that the Raman spectra in this case are dominated by disorder-induced bands
reflecting the oxygen partial phonon density of states (PDOS). The PDOS origin
of the main Raman bands in insulating phases of such compounds is evidenced by
the similar lineshape of experimental spectra and calculated smeared PDOS and
disappearance of the PDOS bands in ordered ferromagnetic metallic phase.

5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol