Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnon dispersion in Ca2RuO4: impact of spin-orbit coupling and oxygen
  moments   The magnon dispersion of Ca$_2$RuO$_4$ has been studied by polarized and
unpolarized neutron scattering experiments on crystals containing 0, 1 and 10 %
of Ti. The entire dispersion of transverse magnons can be well described by a
conventional spin-wave model with interaction and anisotropy parameters that
agree with density functional theory calculations. Spin-orbit coupling strongly
influences the magnetic excitations, which is most visible in large energies of
the magnetic zone-center modes arising from magnetic anisotropy. We find
evidence for a low-lying additional mode that exhibits strongest scattering
intensity near the antiferromagnetic zone center. This extra signal can be
explained by a sizable magnetic moment of 0.11 Bohr magnetons on the apical
oxygens parallel to the Ru moment, which is found in the density functional
theory calculations. The energy and the signal strength of the additional
branch are well described by taking into account this oxygen moment with weak
ferromagnetic coupling between Ru and O moments.

37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math