Semiconducting two-dimensional materials with chemical formula MoSi2X4 (X= N, P, or As)
are studied by means of atomistic ground-and excited-state first-principles simulations. Full …

Interactions between out-of-plane dipoles in bosonic gases enable the long-range
propagation of excitons. The lack of direct control over collective dipolar properties has so …

Excitons (coupled electron–hole pairs) in semiconductors can form collective states that
sometimes exhibit spectacular nonlinear properties. Here, we show experimental evidence …

Nonlinear interactions between excitons strongly coupled to light are key for accessing
quantum many-body phenomena in polariton systems. Atomically-thin two-dimensional …

Van der Waals (vdW) materials at their 2D limit are diverse, flexible, and unique laboratories
to study fundamental quantum phenomena and their future applications. Their novel …

Atomically thin semiconductors such as transition metal dichalcogenide (TMD) monolayers
exhibit a very strong Coulomb interaction, giving rise to a rich exciton landscape. This makes …

Realizing nonlinear optical response in the low photon density limit in solid-state systems
has been a long-standing challenge. Semiconductor microcavities in the strong coupling …

Interlayer excitons (IXs), composed of electron and hole states localized in different layers,
excel in bilayers composed of atomically thin van der Waals materials such as …

Mechanical deformations and ensuing strain are routinely exploited to tune the band gap
energy and to enhance the functionalities of two-dimensional crystals. In this Letter, we show …

Multilayered van der Waals heterostructures based on transition metal dichalcogenides are
suitable platforms on which to study interlayer (dipolar) excitons, in which electrons and …