Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polaron-mediated spin correlations in metallic and insulating
  La$_{1-x}A_{x}$MnO$_{3}$ ($A$=Ca, Sr, or Ba)   Neutron spectroscopy measurements reveal short-range spin correlations near
and above the ferromagnetic-paramagnetic phase transition in manganite
materials of the form La$_{1-x}A_{x}$MnO$_{3}$, including samples with an
insulating ground state as well as colossal magnetoresistive samples with a
metallic ground state. Quasielastic magnetic scattering is revealed that forms
clear ridges running along the [100]-type directions in momentum space. A
simple model consisting of a conduction electron hopping between spin polarized
Mn ions that becomes self-trapped after a few hops captures the essential
physics of this magnetic component of the scattering. We associate this
scattering component with the magnetic part of diffuse polarons, as we observe
a temperature dependence similar to that of the diffuse structural scattering
arising from individual polarons.

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The categories of this paper are: solv-int
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph