Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Combined Effect of Stacking and Magnetic Field on Plasmon Excitations in
  Bilayer Graphene   The electronic excitations of bilayer graphene (BLG) under a magnetic field
are investigated with the use of the Peierls tight-binding model in conjunction
with random-phase approximation (RPA). The interlayer atomic interactions,
interlayer Coulomb interactions, and magnetic field effects are simultaneously
included in the dielectric-function matrix. That enables us to derive the
magneto-Coulomb-excitation spectrum of different stacking structures. The two
typical arrangements of BLGs, AB and AA, are considered in this article. AB-BLG
exhibits many discrete energy-loss peaks, which correspond to the quantization
of electron energies. On the other hand, the AA-BLG spectra possess a unique
and pronounced peak at low frequency. This peak represents the collective
excitation of the entire low-frequency Landau states. The dependence of the
energy-loss peaks on the momentum transfer and the magnetic field strength is
presented. Accordingly, two kinds of plasmon modes produced by the layer
stacking are clearly distinguished.

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The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th