报告题目 (Title)：Strong correlation and topology in 2D semiconductor moiré superlattices

报告人 (Speaker)：李听昕 副教授（上海交通大学）

报告时间 (Time)：2021年11月3日(周三) 15:00

报告地点 (Place)：校本部 E106

邀请人 (Inviter)：陈阳阳

摘要 (Abstract)：

Moiré superlattices formed in van der Waals materials have emerged as a new platform to explore strong correlation physics and topological physics in two-dimensional (2D) electronic systems. In this talk, I will mainly present electronic transport and compressibility studies of moiré superlattices built on 2D transition metal dichalcogenide (TMDc) semiconductors. A series of correlation-driven states, including Mott insulators [1], generalized Wigner crystals [2], and stripe phases [3], formed at either integer or fractional filling factors of the moiré superlattice. Benefiting from the extraordinary tunability of the system, an interaction-driven Mott transition has been realized experimentally [4]. Furthermore, we found the band topology also plays an important role in TMDc moiré superlattice, which enable us to realize a quantum anomalous Hall state in TMDc moiré superlattice [5]. Our studies pave the path for discovery of a wealth of emergent phenomena arising from the combined influence of strong correlation and topology in TMDc moiré superlattice.

[1] Y. Tang et al. Nature 579, 353-358 (2020).

[2] T. Li et al. Nature Nanotechnology 16, 1068-1072 (2021).

[3] C. Jin et al. Nature Materials 20, 940-944 (2021).

[4] T. Li et al. Nature 597, 350-354 (2021).

[5] T. Li et al. arXiv:2107.01796

报告人简介：

李听昕，现任上海交通大学物理与天文学院副教授，博士生导师。2011年于西北大学获学士学位，2016年于北京大学获博士学位（导师杜瑞瑞教授）。2016年至2021年先后在美国莱斯大学（2016.9-2018.3）和美国康奈尔大学（2018.3-2021.5, Prof. J. Shan & Prof. K. F. Mak课题组）从事博士后研究。主要研究兴趣为低维量子材料中的强关联物理、拓扑物理、磁性物理和超导物理等。近几年在二维半导体莫尔超晶格、二维拓扑绝缘体、二维磁性材料等方向取得了一系列研究成果，发表学术论文20余篇，其中包括第一作者（含共同一作）Nature一篇、Nature Materials三篇、Nature Nanotechnology一篇、Physical Review Letters两篇。