Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Orbital, spin and valley contributions to Zeeman splitting of excitonic
  resonances in MoSe$_2$, WSe$_2$ and WS$_2$ monolayers   We present a comprehensive optical study of the excitonic Zeeman effects in
transition metal dichalcogenide monolayers, which are discussed comparatively
for selected materials: MoSe$_2$, WSe$_2$ and WS$_2$. We introduce a simple
semi-phenomenological description of the magnetic field evolution of individual
electronic states in fundamental sub-bands by considering three additive
components: valley, spin and orbital terms. We corroborate the validity of the
proposed description by inspecting the Zeeman-like splitting of neutral and
charged excitonic resonances in absorption-type spectra. The values of all
three terms are estimated based on the experimental data, demonstrating the
significance of the valley term for a consistent description of magnetic field
evolution of optical resonances, particularly those corresponding to charged
states. The established model is further exploited for discussion of
magneto-luminescence data. We propose an interpretation of the observed large
g-factor values of low energy emission lines, due to so-called bound/localized
excitons in tungsten based compounds, based on the brightening mechanisms of
dark excitonic states.

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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
2
The categories of this paper are: math
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs