Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Puzzling magneto-optical properties of ZnMnO films   Optical and magneto-optical properties of ZnMnO films grown at low
temperature by Atomic Layer Deposition are discussed. A strong polarization of
excitonic photoluminescence is reported, surprisingly observed without
splitting or spectral shift of excitonic transitions. Present results suggest
possibility of Mn recharging in ZnO lattice. Strong absorption, with onset at
about 2.1 eV, is related to Mn 2+ to 3+ photo-ionization. We propose that the
observed strong circular polarization of excitonic emission is of a similar
character as the one observed by us for ZnSe:Cr.

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The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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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: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: astro-ph
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The categories of this paper are: econ
35
The categories of this paper are: mtrl-th