Correlations and Topology in Moiré Materials 2025

From 27 to 30 July 2025 the workshop “Correlations and Topology in Moiré Materials” in Ascona, Ticino, brought together several leading world experts in the field of moiré materials. A moiré material is a special type of layered two-dimensional material where due to a twist angle or lattice mismatch between the layers a large-scale geometric moiré pattern appears.

This, in turn, allows for the realization of novel electronic phases. Striking examples of new correlated phases are the fractional Chern insulators, which were discovered by invited speaker Xiaodong Xu in transition-metal dichalcogenide bilayers, and strange metal behavior in twisted bilayer graphene as shown by invited speaker Dmitry Efetov.

The meeting hosted both experimentalists and theorists. From Switzerland, invited speakers included Antoine Georges (Geneva), Mitali Banerjee (EPFL), Dan Mao (Zurich) and Atac Imamoglu (ETH). This workshop was funded by the Manep.