In this colloquium, we review the research on excitons in van der Waals heterostructures
from the point of view of variational calculations. We first make a presentation of the current …

In the archetypal monolayer semiconductor WSe 2, the distinct ordering of spin-polarized
valleys (low-energy pockets) in the conduction band allows for studies of not only simple …

In this Perspective article, the reader is introduced to several theoretical methods of
determining the exciton wave functions and the corresponding eigenenergies. The methods …

Monolayer WS e 2 hosts a series of exciton Rydberg states denoted by the principal
quantum number n= 1, 2, 3, etc. While most research focuses on their absorption properties …

We investigate Landau-quantized excitonic absorption and luminescence of monolayer
WSe 2 under magnetic field. We observe gate-dependent quantum oscillations in the bright …

We study the optical properties of semiconducting transition metal dichalcogenide
monolayers under the influence of strong out-of-plane magnetic fields, using the effective …

We studied the exciton properties in double layers of transition metal dichalcogenides
(TMDs) with a dielectric spacer between the layers. We developed a method based on an …

In this paper we develop a semi-analytical perturbation-theory approach to the calculation of
the energy levels (binding energies) and wave functions of excitons in phosphorene. Our …

We show that hexagonal boron nitride (hBN), a two-dimensional insulator, when subjected
to an external superlattice potential forms a paradigm for electrostatically tunable excitons in …

The comprehensive analyses of exciton states and absorption spectra from freestanding
monolayer transition metal dichalcogenides such as MoS 2, MoSe 2, MoTe 2, WS 2, and …