2023年6月14日下午3点，于14号楼205会议室，我们十分荣幸邀请到加州大学圣地亚哥分校（University of California, San Diego）李绍巍助理教授来作学术报告会。报告人简介和报告内容如下：
报告题目：二维强关联半导体材料：从平带到电子晶体（2D Strongly Correlated Semiconductors: from Moiré Flat Band to Generalized Wigner Crystal）
报告人简介：
Dr. Shaowei Li is an assistant professor at University of California, San Diego. He received B.S. in Physics from Nankai University in 2010 and Ph.D. in physics from University of California, Irvine in 2017. Before joining UC San Diego, he was a postdoc scholar at Northwestern University and later a Heising Simons Junior Fellow at UC Berkeley. His research focuses on probing the fundamental properties of low dimensional systems with scanning tunneling microscopy and spectroscopy. Dr. Li is the recipient of a series of academic awards including Hellman Fellowship, AVS NSTD Early Career Award, OCPA Outstanding Dissertation Award, ACS Physical Chemistry Young Investigator Award, and APS FWS Margaret Burbidge Award.
报告摘要：
Van der Waals heterostructures of atomically thin transition metal dichalcogenides provide an exciting new platform to design and fabricate novel electronic and optical devices. Through the precise control of the stacking order and the twist angle between two adjacent layers, the moiré superlattice can lead to tunable narrow electronic minibands, where long-range Coulomb interactions play a critical role in determining strongly correlated electron states. This has led to the observation of the Mott insulating state at half filling, as well as the generalized Wigner crystal states at fractional fillings. However, the direct microscopic understanding of these emerging quantum phases has long been hindered by many experimental challenges. In this talk, I will present a series of technical advancements in scanning tunneling microscopy which allow us to directly visualize the correlated phases in the closely aligned WS2/WSe2 moiré superlattices.
