Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Signatures of defect-localized charged excitons in the photoluminescence
  of monolayer molybdenum disulfide   We study spatial photoluminescence characteristics of neutral and charged
excitons across extended monolayer MoS$_2$ synthesized by chemical vapor
deposition. Using two-dimensional hyperspectral photoluminescence mapping at
cryogenic temperatures we identify regions with increased emission from charged
excitons associated with both spin-orbit split valence subbands. Such regions
are attributed to unintentional doping at defect sites with excess charge that
bind neutral excitons to form defect-pinned trions. Our findings imply
comparable timescales for the formation, relaxation, and radiative decay of $B$
trions, and add defect-localized $A$ and $B$ trions to the realm of
photoexcited quasiparticles in layered semiconductors.

1
The categories of this paper are: cs
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess