On May 19, 2023, Peking University Gezhi Forum (Lecture 15) was successfully held in Siyuan Hall, Physics Building, Peking University. Yu Ye, an associate professor with tenure of the Institute of Condensed Physics and Materials Physics, Peking University, gave a talk entitled "The Preparation, Physical Properties and Related Devices of Two-Dimensional Materials". The forum was hosted by Professor Tang Ning from the Institute of Condensed Physics and Materials Physics, assistant dean of the School of Physics.
Yu Ye started with the discovery of two-dimensional (2D) materials, then extended to the complex and novel physical phenomena that 2D materials include in the 2D limit and at the 2D heterostructure interfaces. He also introduced that 2D materials are not only new materials but also new manufacturing paradigms, which points to new application prospects in the field of nano-manufacturing. Then, based on the research work of his own research group, taking magnetic properties under the 2D limit and the new paradigm of “upward manufacturing” integrated circuit technology for interlayer interconnection as examples, he introduced in detail the magnetic phase diagram under the 2D limit, magnetoelectric coupling in the one-dimensional stripy antiferromagnet CrOCl, and the high efficient current-assisted magnetism modulation in Co3Sn2S2 in the first part, and controllable preparation of the 2D semiconductor single crystal wafer, a new paradigm hetero-epitaxy of 2D semiconductor on the arbitrary surface, and precise n and p doping of 2D semiconductor in the second part.
After the talk, Yu Ye conducted in-depth discussions with on-site and online audiences on topics such as probing magnetic properties under the 2D limit, the mechanism of in-plane 2D epitaxy, and the development trend of 2D materials, and gave brief answers to each question one by one.
Yu Ye is an associate professor with tenure in the School of Physics at Peking University. He received his Ph.D. degree in condensed matter physics from Peking University in 2012. Prior to joining PKU in July 2016, Yu was working as a postdoctoral researcher at the University of California, Berkeley. His group (http://faculty.pku.edu.cn/yeyu) currently is interested in light-matter interactions and electrical transport properties in condensed matter physics, with an emphasis on novel physical phenomena emerging in atomically-thin materials, van der Waals heterostructures and surfaces/interfaces by nanoscale device designs, low-T-high-B optical spectroscopy, and electrical transport measurements. Yu published more than 100 research papers and earned >7500 citations with an h-index of 42.