Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Valley Plasmonics in the Dichalcogenides   The rich phenomenology of plasmonic excitations in the dichalcogenides is
analyzed as a function of doping. The many-body polarization, the dielectric
response function and electron energy loss spectra are calculated using an ab
initio based model involving material-realistic Coulomb interactions, band
structure and spin-orbit coupling. Focusing on the representative case of
MoS$_2$, a plethora of plasmon bands are observed, originating from scattering
processes within and between the conduction or valence band valleys. We discuss
the resulting square-root and linear collective modes, arising from long-range
versus short-range screening of the Coulomb potential. We show that the
multi-orbital nature of the bands and spin-orbit coupling strongly affects
inter-valley scattering processes by gapping certain two-particle modes at
large momentum transfer.

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The categories of this paper are: chem-ph
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The categories of this paper are: econ
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: eess
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom