Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Absorption of circular polarized light in tilted Type-I and II Weyl
  semimetals   We calculate the A.C. optical response to circularly polarized light of a
Weyl semimetal (WSM) with varying amounts of tilt of the Dirac cones. Both
type-I and II (overtilted) WSM are considered in a continuum model with broken
time reversal (TR) symmetry. The Weyl nodes appear in pairs of equal energies
but of opposite momentum and chirality. For type-I the response of a particular
node to right (RHP) and left (LHP) hand polarized light are distinct only in a
limited range of photon energy $\Omega$,
$\frac{2}{1+C_{2}/v}<\frac{\Omega}{\mu}<\frac{2}{1-C_{2}/v}$ with $\mu$ the
chemical potential and $C_{2}$ the tilt associated with the positive chirality
node assuming the two nodes are oppositely tilted. For the over tilted case
(type-II) the same lower bound applies but there is no upper bound. If the tilt
is reversed the RHP and LHP response are also reversed. We present
corresponding results for the Hall angle.

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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: q-bio
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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: cs
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The categories of this paper are: mtrl-th