| 报告人简介 |
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 (2016-2018) and later at University of Maryland (2018-2020). His research is on condensed matter theory, with a focus on quantum physics governed by the interplay of symmetry, topology and many-body interactions. He has authored/coauthored about 30- peer-reviewed papers, including 1 Nature, 1 Science, and 7 Physical Review Letters. |
报告摘要 |
Moiré superlattices formed in van der Waals bilayers provide vast new opportunities to realize quantum phases that would otherwise be absent. In the first part of the lecture, I will review experimental progresses on magic-angle twisted bilayer graphene (TBG), where a variety of intriguing phenomena have been observed, including superconductivity, quantum anomalous Hall effect, nematicity, large linear-in-T resistivity, Pomeranchuk effect, etc. In the second part of the lecture, I will present our own theoretical works 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. If time allows, I will also describe our theoretical proposal of using twisted bilayer transition metal dichalcogenides as quantum simulators of Hubbard model, and discuss recent experimental realizations.
|
