Tungsten-based monolayer transition metal dichalcogenides host a long-lived “dark”
exciton, an electron-hole pair in a spin-triplet configuration. The long lifetime and unique …

The interaction of excitons with lattice vibrations underlies the scattering from bright to dark
excitons as well as the coherent modulation of the exciton energy. Unlike the former …

In this study, we utilized a rigorous ab initio-based finite momentum Bethe–Salpeter
equation to investigate the photoluminescence emission in two-dimensional hexagonal …

The light-mediated interaction of fermionic and bosonic excitations governs the
optoelectronic properties of condensed matter systems. In photoexcited semiconductors, the …

Large linear and nonlinear optical responses can be obtained from two-dimensional
semiconductors with an indirect electronic gap. Here, we demonstrate exceptionally large …

Ultrafast X-ray scattering is one of the primary tools to track intrinsic crystallographic
evolution with atomic accuracy in real time. However, its application to study nonequilibrium …

As a new member in the family of two-dimensional (2D) transition-metal dichalcogenides,
the excited-state properties of Janus MoSSe have not been correctly understood yet …

We demonstrate that atomically thin nitrogen-based binary group V wide band gap indirect
semiconductors (β-NX (X= As, Sb)) embody 3-fold valley degenerated band structures and …

The interplay between dimensionality and anisotropicity leads to intriguing optoelectronic
properties and exciton dynamics in low dimensional semiconductors. In this study we use …

A laser power-dependent Raman spectroscopic study has been done to explore the phonon
shift, electron–phonon coupling, phase change, and surface temperature in hydrothermally …