Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scattering Continuum and Possible Fractionalized Excitations in
  $\alpha$-RuCl$_3$   The combination of electronic correlation and spin-orbit coupling is thought
to precipitate a variety of highly unusual electronic phases in solids,
including topological and quantum spin liquid states. We report a Raman
scattering study that provides evidence for unconventional excitations in
$\alpha$-RuCl$_3$, a spin-orbit coupled Mott insulator on the honeycomb
lattice. In particular, our measurements reveal unusual magnetic scattering,
typified by a broad continuum. The temperature dependence of this continuum is
evident over a large scale compared to the magnetic ordering temperature,
suggestive of frustrated magnetic interactions. This is confirmed through an
analysis of the phonon linewidths, which show a related anomaly due to
spin-phonon coupling. These observations are in line with theoretical
expectations for the Heisenberg-Kitaev model and suggest that $\alpha$-RuCl$_3$
may be close to a quantum spin liquid ground state.

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The categories of this paper are: q-fin
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The categories of this paper are: eess
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn