Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized plasma waves in layered superconductors   In a layered and strongly anisotropic superconductor the hybrid modes
provided by the propagation of electromagnetic waves in the matter identify two
well separate energy scales connected to the large in-plane plasma frequency
and to the soft out-of-plane Josephson plasmon. Despite the wide interest in
their detection and manipulation by means of different experimental protocols,
a unified description of plasma waves valid at arbitrary energy and momentum is
still lacking. Here we provide a complete description of generalized plasma
waves in a layered superconductors by taking advantage of their connection to
the gauge-invariant superconducting phase. We show that the anisotropy of the
superfluid response leads to two intertwined hybrid light-matter modes with
mixed longitudinal and transverse character, while a purely longitudinal
plasmon is only recovered for wavevectors larger than the crossover scale set
in by the plasma-frequencies anisotropy. Interestingly, below such scale both
modes appears with equal weight in the physical density response. Our results
open a promising perspective for plasmonic applications made possible by the
next-generation spectroscopic techniques able to combine sub-micron momentum
resolution with THz energy resolution.

31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio