Excitonic Complexes in Two-Dimensional Transition Metal Dichalcogenides

Abstract

The enhanced Coulomb interaction in two dimensions leads to not only tightly bound excitons but also many-particle excitonic complexes: excitons interacting with other quasiparticles, which results in improved and even new exciton properties with better controls. Here, we summarize studies of excitonic complexes in monolayer transition metal dichalcogenides and their moiré heterojunctions, envisioning how to utilize them for exploring quantum many-body physics.

Can 2D Semiconductors Be Game-Changers for Nanoelectronics and Photonics?

“…Importantly, the ultrahigh exciton binding energy in 2D semiconductors also leads to the formation of many-body quasiparticles, such as trions and biexcitons, observable at RT. 131 This phenomenon provides fertile ground for fundamental research, enabling studies that have been traditionally challenging to conduct.…”

“…This enhancement facilitates the effective manipulation of their emission properties at room temperature (RT) by various external stimuli, , presenting significant advantages for applications such as light-emitting diodes (LEDs) and lasers. Importantly, the ultrahigh exciton binding energy in 2D semiconductors also leads to the formation of many-body quasiparticles, such as trions and biexcitons, observable at RT . This phenomenon provides fertile ground for fundamental research, enabling studies that have been traditionally challenging to conduct.…”