Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Circular photon drag effect in bulk tellurium   The circular photon drag effect is observed in a bulk semiconductor. The
photocurrent caused by a transfer of both translational and angular momenta of
light to charge carriers is detected in tellurium in the mid-infrared frequency
range. Dependencies of the photocurrent on the light polarization and on the
incidence angle agree with the symmetry analysis of the circular photon drag
effect. Microscopic models of the effect are developed for both intra- and
inter-subband optical absorption in the valence band of tellurium. The shift
contribution to the circular photon drag current is calculated. An observed
decrease of the circular photon drag current with increase of the photon energy
is explained by the theory for inter-subband optical transitions. Theoretical
estimates of the circular photon drag current agree with the experimental data.

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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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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: funct-an
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The categories of this paper are: atom-ph
3
The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph