Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transverse optical plasmons in layered superconductors   We discuss the possible existance of transverse optical plasma modes in
superlattices consisting of Josephson coupled superconducting layers. These
modes appear as resonances in the current-current correlation function, as
opposed to the usual plasmons which are poles in the density-density channel.
We consider both bilayer superlattices, and single layer lattices with a spread
of interlayer Josephson couplings. We show that our model is in quantitative
agreement with the recent experimental observation by a number of groups of a
peak at the Josephson plasma frequency in the optical conductivity of
La$_{1.85}$Sr$_{0.15}$CuO$_4$

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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: cs
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The categories of this paper are: physics
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th