RWTH Aachen University

Online Meeting Room ID (Tencent Meeting): 870-925-914

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Abstract: 

We propose twisted van der Waals heterostructures as an efficient, reliable and scalable quantum platform that enables the seamless realization and control of a plethora of interacting quantum models in a solid state framework. These new materials hold great promise to realize novel and elusive states of matter in experiment. We survey these systems as platform to study strongly correlated physics and topology that is notoriously difficult to study computationally [1]. Among the features that make these materials a versatile toolbox are (i) tunability of properties via readily accessible external parameters (such as gating, straining, packing and twist angle), (ii) ability to realize and control a large number of fundamental many-body quantum models relevant in the field of condensed matter physics and beyond and (iii) state-of-the-art experimental readouts exist to directly map out their rich phase diagrams in and out of equilibrium. This general framework, besides unravelling new phases of matter, permits to identify their key microscopic ingredients and therefore to robustly realize and functionalize those new phases in other material systems, deepening our fundamental understanding and holding many promises for future technological applications. As examples we discuss our recent findings in twisted bilayer graphene, bilayer BN, double bilayer graphene, bilayer WSe2, bilayer MoS2, bilayer GeSe and generalizations to three dimensions [2].

Reference:

[1] Nature Physics 17, 155 (2021).

[2] Nature 572, 95-100 (2019), Nature Communications 11, 1124 (2020), Nature Materials 19, 861 (2020), Phys. Rev. B 102, 085109 (2020),  Phys. Rev. B 103, 041103 (2021), PNAS 118 (4), e2017366118, Nat Communications 12, 242 (2021), Nat Communications 12, 5644 (2021) , Nano Letters 2021 21 (18), 7519.

Brief CV of Prof. Dante Marvin Kennes:

Dante Kennes  is a professor at the RWTH Aachen University and visiting scientist at the Max Planck Institute for the Structure and Dynamics of Matter. His research focus lies on the theoretical study of ultrafast quantum materials design, non-equilibrium quantum many-body dynamics and twisted van der Waals heterostructures. Dante Kennes received his Ph.D. form RWTH Aachen University followed by postdoc positions at Columbia University (Andrew Millis) and FU Berlin (Christoph Karrasch). He has put forward a number of important developments to push the boundaries of renormalization group- or tensor network-based methods applicable to the out of equilibrium realm of strongly correlated systems. Recently, he has also made important contributions to the quickly emerging field of designing two-dimensional quantum materials. These advances allow to realize quantum materials with specific tailored properties enabling novel quantum functionalities.

Host: Prof. Yi Zhou, Institute of Physics, CAS

Contact: Shujuan Cui（崔书娟）

Email: sjcui@iphy.ac.cn

Tel: 010-82649894