时间：2023年3月23日（周四）下午 13:30-15:00

Time：13:30-15:00, Thursday, March 23rd, 2023

主持人: 西湖大学理学院讲席教授 吴从军

Host: Prof. Congjun Wu, Chair Professor of School of Science, Westlake University

地址：西湖大学云谷校区E10-211教室

Venue: E10-211, Yungu Campus, Westlake University

宋志达

北京大学量子材料科学中心

Zhida Song

International Center for Quantum Materials (ICQM), Peking University

主讲人/Biography:

Dr. Zhi-Da Song, Assistant Professor at the International Center for Quantum Materials (ICQM) of Peking University. Song got his Bachelor's degree in 2013 from the University of Electronic Science of Technology of China. He received his Ph.D. in 2018 from the Institute of Physics of the Chinese Academy of Sciences. During 2018-2021, Song was a postdoctoral researcher in Andrei Bernevig’s group at Princeton University. In 2021, Song joined ICQM as an assistant professor. His research interests extend over the theoretical studies of topological phases of matter, quantum Hall systems, and low-dimensional strongly interacting systems.

讲座摘要/Abstract:

A number of interesting physics phenomena have been discovered in magic-angle twisted bilayer graphene (MATBG), such as superconductivity, correlated gapped and gapless phases, etc. In this work, we point out that a series of exotic phenomena (beyond mean-field theories) result from a simple unified mechanism - the Kondo effect. Using realistic parameters given by the previous THF model work, the computed spectral densities, entropies, and spin susceptibilities are quantitatively comparable to experiments. We predict that the ground state in a wide range of fractional fillings is the heavy Fermi liquid, and conjecture that the heavy Fermi liquid is the parent state of the observed unconventional superconductivity.

讲座联系人/Contact:

理学院，张悦，邮箱：zhangyue62@westlake.edu.cn

School of Science, Yue Zhang, Email: zhangyue62@westlake.edu.cn