Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Auger recombination of dark excitons in ${\rm WS_2}$ and ${\rm WSe_2}$
  monolayers   We propose a novel phonon assisted Auger process unique to the electronic
band structure of monolayer transition metal dichalcogenides (TMDCs), which
dominates the radiative recombination of ground state excitons in Tungsten
based TMDCs. Using experimental and DFT computed values for the exciton
energies, spin-orbit splittings, optical matrix element, and the Auger matrix
elements, we find that the Auger process begins to dominate at carrier
densities as low as $10^{9-10}~{\rm cm^{-2}}$, thus providing a plausible
explanation for the low quantum efficiencies reported for these materials.

35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn