17.12.2021 Dark exciton anti-funneling in atomically thin semiconductors (published in Nature Communications)

In this joint theory-experiment work, we have combined spatiotemporal photoluminescence measurements with microscopic many-particle theory to track the way of excitons in time, space and energy. We found that excitons surprisingly move away from high-strain regions. This anti-funneling behavior can be traced back to the crucial role of propagating dark excitons which possess an opposite strain-induced energy variation compared to bright excitons. The findings open new possibilities to control the transport in materials dominated by excitons. This work was done in collaboration with the research group of Rudolf Bratschitsch (University of Münster) and it was published in Nature Communications.

Press release: News Philipps-University Marburg

Nature Communications 12, 7221 (2021)