Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magneto-excitons in large area CVD grown monolayer MoS$_{2}$ and
  MoSe$_{2}$ on sapphire   Magneto transmission spectroscopy was employed to study the valley Zeeman
effect in large-area monolayer MoS$_{2}$ and MoSe$_{2}$. The extracted values
of the valley g-factors for both A- and B-exciton were found be similar with
$g_v \simeq -4.5$. The samples are expected to be strained due to the CVD
growth on sapphire at high temperature ($700^\circ$C). However, the estimated
strain, which is maximum at low temperature, is only $\simeq 0.2\%$.
Theoretical considerations suggest that the strain is too small to
significantly influence the electronic properties. This is confirmed by the
measured value of valley g-factor, and the measured temperature dependence of
the band gap, which are almost identical for CVD and mechanically exfoliated
MoS$_2$.

21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn