Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Infrared observation of the Hund's mechanism in an electron-doped
  manganite   In the mid-infrared absorption of Sr{1-x}Ce{x}MnO{3} at low electron doping
(x = 0.05), a band at 0.3 eV is fully replaced by another one at 0.9 eV as the
system becomes antiferromagnetic (AF) of type $G$. A weaker effect occurs at x
= 0.10 for an AF phase of type $C$. One thus directly measures the electron
hopping energies for spin parallel and anti-parallel to that of the host ion.
The Hund's, crystal-field, and Jahn-Teller splittings for the Mn{3+} ions in a
Mn{4+} matrix, can also be derived.

23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas