Theory of exciton-electron scattering in atomically thin semiconductors

Interacting electrons and excitons promise fascinating applications, such as exciton-mediated superconductors or semiconductor-based quantum simulators. A detailed understanding of the force, coupling electrons, and excitons is crucial to realize such applications in atomically thin semiconductors. The authors achieve this by developing an approach that simulates the physics of three charges in monolayer transition metal dichalcogenides (TMD). Their approach predicts novel rotational bound trions as well as collisional states. This allows for the derivation of an accurate model of exciton-electron interactions and, as an application, for the prediction of the photoabsorption properties of electron-doped TMD, revealing the existence of exciton-polarons.