Chiral Cavity Control of Spatially Indirect Excitons

In transition metal dichalcogenide (TMD) heterostructures, low-density, spatially indirect excitons condense and exhibit s-wave pairing in the presence of time-reversal symmetry (TRS). When placed in a cavity, charged particles couple to the photon field, and the photons mediate an effective interaction between such charged particles. If the cavity is chiral, allowing for only one chirality of light, then TRS is no longer present and electron-hole s-pairing is suppressed making p-pairing more abundant. Using a Hartree-Fock ansatz, we variationally calculate the ground state of electrons and holes in a TMD hetero-bilayer where interlayer tunneling is absent. We investigate how a chiral cavity and other experimentally controllable parameters influence electron-hole pairing.