Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tip-induced excitonic luminescence nanoscopy of an atomically-resolved
  van der Waals heterostructure   Low-temperature scanning tunneling microscopy is used to probe, with
atomic-scale spatial resolution, the intrinsic luminescence of a van der Waals
heterostructure, made of a transition metal dichalcogenide monolayer stacked
onto a few-layer graphene flake supported by an Au(111) substrate. Sharp
emission lines arising from neutral, charged and localised excitons are
reported. Their intensities and emission energies vary as a function of the
nanoscale environment of the van der Waals heterostructure, explaining the
variability of the emission properties observed with diffraction-limited
approaches. Our work paves the way towards understanding and control of
optoelectronic phenomena in moir\'e superlattices with atomic-scale resolution.

12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg