Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tuning electronic and optical properties of bismuth monolayers by
  molecular adsorption   We perform first-principles calculations of electronic and dielectric
properties of bismuthene functionalized with small ligands using
first-principle calculations. We show that all functionalized structures have
topological insulating (TI) behavior with a sizeable gap by calculating the
Z$_2$ topological invariant. Furthermore the adsorption of all groups induce a
quasi-planar structure to the initially pristine bismuthene structure. Finally
we show that the dielectric properties show a large anisotropy with two main in
plane absorption peaks.

24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg