Dipolar many-body complexes and their interactions in stacked 2D heterobilayers

Alice (and Bob) in Flatland

“…Biexcitons have attracted particular attention, given that their emission can be understood as a pair of entangled photons that may have a single wave function, but the fine structure splitting limits the entanglement fidelity. A possible route to overcome this issue could be the achievement of interlayer biexcitons, where electrons and holes lie in different layers of TMD heterostructures, being the exchange effect absent in vertically separated structures . Interlayer excitonic species would be highly promising also due to their remarkable energy tunability via the Stark effect .…”