Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron recoil effect in electrically tunable MoSe2 monolayers   Radiative recombination of excitons dressed by the interactions with free
charge carriers often occurs under simultaneous excitation of either electrons
or holes to unbound states. This phenomenon, known as the electron recoil
effect, manifests itself in pronounced, asymmetric spectral lineshapes of the
resulting emission. We study the electron recoil effect experimentally in
electrically-tunable monolayer semiconductors and derive it theoretically using
both trion and Fermi-polaron pictures. Time-resolved analysis of the recoil
lineshapes is employed to access transient, non-equilibrium states of the
exciton-carrier complexes. We demonstrate cooling of the initially overheated
populations on the picosecond timescales and reveal the impact of lattice
temperature and free carrier density. Both thermally activated phonons and the
presence of free charges are shown to accelerate equilibration. Finally, we
find strong correlations between relaxation times from recoil analysis and
luminescence rise times, providing a consistent interpretation for the initial
dynamics of trion/Fermi-polaron states.

16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg