Large-scale many-body simulation of excitonic tunability in 2D GeS via random defect-engineering

The interplay between electron correlation and intrinsic disorder in materials is a key topic for exploring exotic physics, including quantum phase transitions, magnetism, and pseudo-gapped metallic states, with potential applications. These effects are particularly pronounced in two-dimensional (2D) systems due to enhanced Coulomb interactions from quantum confinement. In this work, we present large-scale calculations of organometallics intercalated 2D GeS using the first-principles-based Typical Medium Dynamical Cluster Approximation (TMDCA) method. Our findings show significant enhancement and tunability of the excitonic absorption, offering promising opportunities for engineering material properties through disorder-engineering[1].