Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lattice dynamical calculations of infinite layer iron oxides SrFeO2 and
  CaFeO2   We report extensive lattice dynamical calculations of the newly discovered
infinite-layer iron oxides SrFeO2 and CaFeO2. For SrFeO2, the parameters of the
interatomic potential have been determined to reproduce the zone-centre phonon
frequencies reported using ab-initio calculations. Further we have extended the
potential model for calculations of CaFeO2. The potential parameters are found
to be transferable between the two compounds, and are used to calculate the
phonon spectra in the whole Brillouin zone and several thermodynamic properties
for these compounds. The calculations show fair agreement with the available
experimental data of structure, thermal expansion, and mean-squared amplitudes
of the atoms.

23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg