SKM 2021 – scientific programme

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SYPQ: Symposium The Rise of Photonic Quantum Technologies – Practical and Fundamental Aspects

SYPQ 1: Symposium: The Rise of Photonic Quantum Technologies – Practical and Fundamental Aspects

SYPQ 1.4: Invited Talk

Friday, October 1, 2021, 11:45–12:15, Audimax 2

Quantum Light and Strongly Correlated Electronic States in a Moiré Heterostructure — •Brian Gerardot — Institute for Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh, UK

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 moire superlattice. The moire 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 moire potential pockets with three-fold symmetry to form quantum dots which can emit single photons. Here I will present magneto-optical spectroscopy of MoSe2/WSe2 heterobilayer devices with a small relative twist. I will discuss moire-trapped inter-layer excitons, which can emit quantum light, and intra-layer excitons, which are sensitive to a large number of strongly correlated electron and hole states as a function of fractional filling.