Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First-principle calculations of phononic, electronic and optical
  properties of monolayer arsenene and antimonene allotropes   Recently a stable monolayer of antimony in buckled honeycomb structure called
antimonene was successfully grown on 3D topological insulator Bi$_2$Te$_3$ and
Sb$_2$Te$_3$, which displays semiconducting properties. By first principle
calculations, we systematically investigate the phononic, electronic and
optical properties of $\alpha-$ and $\beta-$ allotropes of monolayer
arsenene/antimonene. We investigate the dynamical stabilities of these four
materials by considering the phonon dispersions. The obtained electronic
structures reveal the direct band gap of monolayer $\alpha-$As/Sb and indirect
band gap of $\beta-$As/Sb. Significant absorption is observed in $\alpha-$Sb,
which can be used as a broad saturable absorber.

20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
2
The categories of this paper are: math
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph