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Excitons Probing Novel Quantum Phenomena

Graphic illustration of exciton transfer in quantum materials

One of the most exciting recent developments in condensed-matter physics is the emergence of moiré materials, created when two van der Waals layers are stacked with a small twist or lattice mismatch. The resulting moiré superlattice generates a periodic potential that confines quasiparticles such as electrons and excitons, giving rise to minibands and strongly correlated states. Their optical and electronic properties depend critically on twist angle and local atomic arrangement, making structural control central for defining their behavior. A key challenge is to understand how additional charge carriers interact with these excitonic states and reshape the resulting quantum phases. Our research explores how carrier density, alignment, and external fields influence moiré systems, with the goal of uncovering interaction-driven excitonic phases and advancing the understanding of correlated quantum matter in 2D semiconductors.

Please contact Prof. Leisgang for more information on the topic.