Exciton in Mott insulator

Recent optical probes have used excitons, electron-hole bound states, to probe correlated insulating phases of two-dimensional semiconducting materials. Motivated by these experiments, we investigate these composite particles involving Mott physics. In this talk, we will discuss the formalism of two types of Mott excitons: Intraband exciton with both charges from a single band Hubbard model, and interband exciton with only one charge in the Mott. We discuss the role of magnetism on these bound states and compare their properties with those from band insulators.

(Pizza and refreshments will be served after the talk.)