Magnetic-field-induced Wigner crystallization of charged interlayer excitons in van der Waals heterostructures

Abstract

In a bilayer semiconductor system, electron-hole excitations, of which the simplest are electron-hole pairs known as excitons, can form by the interaction of charge carriers across the layers to come in various guises depending on the number and type of the charge carriers involved. Here, the authors theoretically investigate the Wigner crystallization of charged interlayer excitons as a function of perpendicular magnetic field applied, discussing how this phase transition could be detected in photoluminescence experiments.