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學術報告: Symmetry, Topology, and Many-Body Interactions in Moiré Systems

來源:  發布時間:2020-12-09 08:46:28 點擊次數:

報告題目: Symmetry, Topology, and Many-Body Interactions in Moiré Systems

報告人:Fengcheng Wu

報告時間:20201211日(周五)下午300

報告地點:物理學院新樓五樓多功能廳


Abstract:

Van der Waals bilayers with a small difference in the lattice constant and/or orientation have long-period moiré patterns, which provide vast new opportunities to control material properties. I will focus on twisted bilayer graphene (TBG) and show how the interplay between many-body interactions, Bloch band symmetry and topology of TBG can lead to possible unconventional superconductivity as well as quantum anomalous Hall effect [1, 2]. If time allows, I will also describe our theoretical proposal of using twisted bilayer transition metal dichalcogenides as quantum simulators of Hubbard model [3, 4], and discuss recent experimental realizations.


References

1. F. Wu, A.?H. MacDonald, and I. Martin, Phys. Rev. Lett. 121, 257001 (2018).

2. F. Wu, S. Das Sarma, Phys. Rev. Lett. 124, 046403 (2020).

3. F. Wu, T. Lovorn, E. Tutuc, A. H. MacDonald, Phys. Rev. Lett. 121, 026402 (2018).

4. F. Wu, T. Lovorn, E. Tutuc, I. Martin, A. H. MacDonald, Phys. Rev. Lett. 122, 086402 (2019).


Speaker: Fengcheng Wu obtained his B. S. in Physics from University of Science and Technology of China in 2011 and Ph.D. in Physics from The University of Texas at Austin in 2016. He performed postdoc research at Argonne National Laboratory and later at University of Maryland.


邀請人:張晨棟 教授


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