Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large cross-polarized Raman signal in CrI$_3$: A first-principles study   We find unusually large cross-polarized (and anti-symmetric) Raman signature
of A$_{\rm g}$ phonon mode in CrI$_3$, in agreement with experiments. The
signal is present only when the following three effects are considered in
concert: ferromagnetism on Cr atoms, spin-orbit interaction, and resonant
effects. Somewhat surprisingly, we find that the relevant spin-orbit
interaction potential originates from iodine atoms, despite magnetism being
mostly on chromium atoms. We analyze the Raman signature as a function of
magnetic order, the direction of the magnetic moment, energy and polarization
of light used for Raman scattering, as well as carrier lifetime. In addition to
a strong cross-polarized Raman signal, we also find unusually strong phonon
modulated magneto-optical Kerr effect (MOKE) in CrI$_3$.

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The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
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The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg