Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing Many-Body Interactions in Monolayer Transition-Metal
  Dichalcogenides   Many-body interactions in monolayer transition-metal dichalcogenides are
strongly affected by their unique band structure. We study these interactions
by measuring the energy shift of neutral excitons (bound electron-hole pairs)
in gated WSe$_2$ and MoSe$_2$. Surprisingly, while the blueshift of the neutral
exciton, $X^0$, in electron-doped samples can be more than 10~meV, the
blueshift in hole-doped samples is nearly absent. Taking into account dynamical
screening and local-field effects, we present a transparent and analytical
model that elucidates the crucial role played by intervalley plasmons in
electron-doped conditions. The energy shift of $X^0$ as a function of charge
density is computed showing agreement with experiment, where the
renormalization of $X^0$ by intervalley plasmons yields a stronger blueshift in
MoSe$_2$ than in WSe$_2$ due to differences in their band ordering.

27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc