Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photo-induced anomalous Hall effect in the type-II Weyl-semimetal WTe2
  at room-temperature   Using Hall photovoltage measurements, we demonstrate that an anomalous
Hall-voltage can be induced in few layer WTe2 under circularly polarized light
illumination. By applying a bias voltage along different crystal axes, we find
that the photo-induced anomalous Hall conductivity coincides with a particular
crystal axis. Our results are consistent with the underlying Berry-curvature
exhibiting a dipolar distribution due to the breaking of crystal inversion
symmetry. Using a time-resolved optoelectronic auto-correlation spectroscopy,
we find that the decay time of the anomalous Hall voltage exceeds the
electron-phonon scattering time by orders of magnitude but is consistent with
the comparatively long spin-lifetime of carriers in the momentum-indirect
electron and hole pockets in WTe2. Our observation suggests, that a helical
modulation of an otherwise isotropic spin-current is the underlying mechanism
of the anomalous Hall effect.

13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
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The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: eess
30
The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an