Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charged Defects and Phonon Hall Effects in Ionic Crystals   It has been known for decades that a magnetic field can deflect phonons as
they flow in response to a thermal gradient, producing a thermal Hall effect.
Several recent experiments have revealed ratios of the phonon Hall conductivity
to the phonon longitudinal conductivity in oxide dielectrics that are larger
than $10^{-3}$ when phonon mean-free-paths exceed phonon wavelengths. At the
same time $\kappa_{H}/\kappa_{L}$ is not strongly temperature dependent. We
argue that these two properties together imply a mechanism related to phonon
scattering from defects that break time-reversal symmetry, and we show that
Lorentz forces acting on charged defects produce substantial skew-scattering
amplitudes, and related thermal Hall effects that are consistent with recent
observations.

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The categories of this paper are: adap-org
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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: cs
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The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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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: q-alg
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The categories of this paper are: physics
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The categories of this paper are: chem-ph