Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Band-gap tuning and optical response of two-dimensional Si$_x$C$_{1-x}$:
  A first-principles real space study of disordered 2D materials   We present a real-space formulation for calculating the electronic structure
and optical conductivity of such random alloys based on the Kubo-Greenwood
formalism interfaced with the augmented space recursion (ASR) [A. Mookerjee, J.
Phys. C: Solid State Phys. {\bf 6}, 1340 (1973)] formulated with the
Tight-binding Linear Muffin-tin Orbitals (TB-LMTO) basis with van
Leeuwen-Baerends corrected exchange (vLB) [Singh et al, Phys. Rev B {\bf 93},
085204, (2016)]. This approach has been used to quantitatively analyze the
effect of chemical disorder on the configuration averaged electronic properties
and optical response of 2D honeycomb siliphene Si$_{x}$C$_{1-x}$ beyond the
usual Dirac-cone approximation. We predicted the quantitative effect of
disorder on both the electronic-structure and optical response over a wide
energy range, and the results discussed in the light of the available
experimental and other theoretical data. Our proposed formalism may open up a
facile way for planned band gap engineering in opto-electronic applications.

2
The categories of this paper are: math
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph