Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced electronic and optical responses of Nitrogen- or Boron-doped
  BeO monolayer: First principle computation   In this work, the electronic and optical properties of a Nitrogen (N) or a
Boron (B) doped BeO monolayer are investigated in the framework of density
functional theory. It is known that the band gap of a BeO monolayer is large
leading to poor material for optoelectronic devices in a wide range of energy.
Using substitutional N or B dopant atoms, we find that the band gap can be
tuned and the optical properties can be improved. In the N(B)-doped BeO
monolayer, the Fermi energy slightly crosses the valence(conduction) band
forming a degenerate semiconductor structure. The N or B atoms thus generate
new states around the Fermi energy increasing the optical conductivity in the
visible light region. Furthermore, the influences of dopant atoms on the
electronic structure, the stability, the dispersion energy, the density of
states, and optical properties such as the plasmon frequency, the excitation
spectra, the dielectric functions, the static dielectric constant, and the
electron energy loss function are discussed for different directions of
polarizations for the incoming electric field.

10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
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The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci