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TT: Fachverband Tiefe Temperaturen

TT 18: Focus Session: Strongly Correlated Quantum States in Moiré Heterostructures (joint session TT/HL/MA)

Tuesday, March 18, 2025, 09:30–13:15, H36

In recent years, significant progress has been made in realizing and exploring correlated quantum states in multilayer moiré heterostructures of graphene or transition metal dichalcogenides. These achievements have been made possible by the high level of control and tunability of these systems. Striking phenomena have been demonstrated experimentally, including unconventional superconductivity, fractional quantum anomalous Hall states, Mott-Wigner states and density waves, as well as kinetic ferromagnetism. Moreover, recently novel spectroscopic experimental techniques have been developed which allow for new ways to explore the dynamical response of these exotic states. This focus session will discuss recent experimental advancements as well as theoretical developments in the field of strongly correlated moiré heterostructures.

Organizers: Dmitri K. Efetov (LMU München), Michael Knap (TU München)

	09:30	TT 18.1	Topical Talk: The Thermoelectric Effect and Its Natural Heavy Fermion Explanation in Twisted Bilayer and Trilayer Graphene — Dumitru Calugaru, Haoyu Hu, Rafael Luque Merino, Nicolas Regnault, Frank Koppens, Dmitri K. Efetov, and •Bogdan Andrei Bernevig
	10:00	TT 18.2	Topical Talk: Angle-Tuned Chiral Phase Transition in Twisted Bilayer Graphene — •Laura Classen, Nikolaos Parthenios, Cheng Huang, Xu Zhang, Maksim Ulybyshev, Fakher Assaad, and Zi Yang Meng
	10:30	TT 18.3	Topical Talk: Quantum Optics of Semiconductor Moire Materials — •Atac Imamoglu
	11:00		15 min. break
	11:15	TT 18.4	Topical Talk: Probing the Band Structures of Multilayer Graphene Using the Quantum Twisting Microscope — •Martin Lee, Ipsita Das, János Papp, Marc Currle, Jiazhuo Li, Mudit Bhatt, Jonah Herzog-Arbeitman, Jiabin Yu, Zhiyuan Zhou, Markus Becherer, Philipp Altpeter, Christian Obermayer, Heribert Lorenz, Kenji Watanabe, Takashi Taniguchi, Bogdan Andrei Bernevig, and Dmitri Efetov
	11:45	TT 18.5	Topical Talk: Gate-Tunable Bose-Fermi Mixture in a Strongly Correlated Moiré Bilayer Electron System — •Nathan Wilson, Amine Ben Mhenni, Wilhelm Kadow, Mikołaj Metelski, Adrian Paulus, Alain Dijkstra, Jonathan Finley, and Michael Knap
	12:15	TT 18.6	Theory for Optical Control of Correlated States in Moiré Transition Metal Dichalcogenide Heterostructures — •Haoyang Tian and Urban Friedrich Peter Seifert
	12:30	TT 18.7	Single-Particle Spectral Function of Fractional Quantum Anomalous Hall States — •Fabian Pichler, Wilhelm Kadow, Clemens Kuhlenkamp, and Michael Knap
	12:45	TT 18.8	Tuneability of Superconducting Properties in Transition Metal Dichalcogenide bilayers — •Michael Winter and Tim O. Wehling
	13:00	TT 18.9	Proximity-Induced Spin-Triplet Superconducting Correlations in Transition Metal Dichalcogenides — •Florian Kayatz, Jorge Cayao, and Annica Black-Schaffer