Time:2026-04-16 14:00

Abstract:Two dimensional semiconductors subject to a moire potential provide a fertile ground for exploration of strongly correlated phases, ranging from kinetic magnetism, through fractional Chern insulators to unconventional superconductivity. In the first set of experiments, we studied topologically trivial moire bands with vanishing exchange interactions; here we observed ferromagnetic correlations stemming from a kinetic mechanism. The focus of the second set of experiments was on interplay between interactions and topology in twisted MoTe2 homobilayer. In this system, we demonstrated optical control of ferromagnetism in general and topological Chern insulator states in particular.

Bio：Atac Imamoglu received his Ph.D. from Stanford University in 1991. From 1993 till 2002, he was a faculty member at University of California at Santa Barbara. Since 2002, he is a professor of physics at ETH Zurich and leads the quantum photonics group. His research interests range from quantum optics to strongly correlated electrons and excitons in two dimensional materials. He is an elected fellow of APS and Optica, and Academia Europea.