Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Core-level spectra from bilayer graphene   We derive core-level spectra for doped free-standing bilayer graphene.
Numerical results are presented for all nine combinations of the doping
concentrations $10^{12}\rm{cm}^{-2}$, $10^{13}\rm{cm}^{-2}$, and
$10^{14}\rm{cm}^{-2}$ in the two graphene sheets and we compare the results to
the reference spectra for monolayer graphene. We furthermore discuss the
spectrum of single-particle inter-band and intra-band excitations in the
$\omega q$-plane, and show how the dispersion curves of the collective modes
are modified in the bilayer system.

35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th