报告题目：Controlling Electronic Properties of Correlated Two-Dimensional Materials

 报告人： Dr. Yijun Yu

             Department of Physics, Fudan University

报告时间：2019年7月5日（星期五）下午2:00-3:00
报告地点：M255会议室
联系人：黄元  82648173       

报告摘要：

Vast opportunities exist in correlated Two-dimensional (2D) materials: they feature a number of exotic phenomena such as charge density waves (CDWs), high-temperature superconductivity (HTS) and magnetism. However, experimentally extracting monolayers from bulk correlated materials and control their electronic properties turned out to be extremely challenging. In this talk, I will introduce the fabrication and control technique we developed in the past years and intriguing results we obtained in several 2D systems. In the model CDW material 1T-TaS₂, we are able to control the phase transitions by thinning it down to the 2D limit or electrochemical gating. In itinerant magnet Fe₃GeTe₂, we observe intrinsic ferromagnetism in the 2D limit and the Curie temperature can be turned up to room temperature. In monolayer high-temperature superconductor Bi₂Sr₂CaCu₂O_8+d, we obtain a phase diagram lack of dimensionality effect, which indicates that monolayer cuprate contains all essential physics of HTS.

报告人简介：

Dr. Yijun Yu is currently a Postdoc associate in Prof. Yuanbo Zhang’s group in Fudan University, Shanghai, China. He received his doctoral degree in 2018 in the same group. His current research interest is focused on transport properties of correlated 2D materials with an emphasis on controlled modulation of electronic structures.