Quantum Light and Strongly Correlated Electronic States in a Moiré Heterostructure скачать в хорошем качестве

Quantum Light and Strongly Correlated Electronic States in a Moiré Heterostructure

Brian Gerardot - Heriot-Watt University Quantum Light and Strongly Correlated Electronic States in a Moiré Heterostructure The unique physical properties of two-dimensional materials, combined with the ability to stack unlimited combinations of atomic layers with arbitrary crystal angle, has unlocked a new paradigm in designer quantum materials. For example, when two different monolayers are brought into contact to form a heterobilayer, the electronic interaction between the two layers results in a spatially periodic potential-energy landscape: the moiré superlattice. The moiré superlattice can create flat bands and quench the kinetic energy of electrons, giving rise to strongly correlated electron systems. Further, single particle wave packets can be trapped in the moiré potential pockets with three-fold symmetry to form ‘quantum dots’ which can emit single photons. Here I will present magneto-optical spectroscopy of a 2H-MoSe2/WSe2 heterobilayer device with ~3° twist. I will discuss moiré-trapped inter-layer excitons, which can emit quantum light, and intra-layer excitons, which exhibit a large number of strongly correlated electron and hole states as a function of fractional filling.