Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resonant inelastic x-ray scattering on single-magnons at oxygen
  $K$-edges   The recent discovery that resonant inelastic x-ray scattering can probe
single-magnon (SM) dispersions in transition metal (TM) oxides when the x-ray
energy is tuned to the TM $L$-edge, has put this technique on a par with
inelastic neutron scattering. It is generally presumed that selection rules
forbid SM-scattering at oxygen (O) $K$-edges. However, based on a symmetry
analysis and exact diagonalization study, we show that SM-scattering at O
K-edges becomes allowed when (i) spin-orbit coupling is present in the TM
d-shell and (ii) inversion symmetry at the O-site is broken. For cuprates the
resulting SM-amplitude is very weak but in iridates both prerequisites can
amply be fulfilled.

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The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th