Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous multi-order Raman scattering in LaMnO_3: a signature of a
  quantum lattice effect in a Jahn-Teller crystal   The multi-order Raman scattering is studied up to a fourth order for a
detwinned LaMnO_3 crystal. Based on a comprehensive data analysis of the
polarisation-dependent Raman spectra, we show that the anomalous features in
the multi-order scattering could be the sidebands on the low-energy mode at
about 25 cm-1. We suggest that this low-energy mode stems from the tunneling
transition between the potential energy minima arising near the Jahn-Teller
Mn3+ ion due to the lattice anharmonicity, and the multi-order scattering is
activated by this low-energy electronic motion. The sidebands are dominated by
the oxygen contribution to the phonon density-of-states, however, there is an
admixture of an additional component, which may arise from coupling between the
low-energy electronic motion and the vibrational modes.

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The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
2
The categories of this paper are: math
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
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The categories of this paper are: alg-geom