Time: 14:00-15:30, Thursday, January 16th, 2025

时间：2025年1月16日（星期四）14:00-15:30

Host: Prof. Wei ZHU, PI of School of Science, Westlake University

主持人:西湖大学物理系PI 朱伟

Venue: E10-211, Yungu Campus, Westlake University

地点: 云谷校区E10-211教室

Lecture Language: Chinese

讲座语言: 中文

李建新教授

南京大学

Prof. Jianxin Li

Nanjing University

主讲人/Speaker：

Jianxin Li is a professor at the School of Physics, Nanjing University, and received his PhD degree from Wuhan University in 1993. He spent one year in the Institute of Physics, Academia Sinica, Taiwan, and one year in the University of California, Berkeley, U.S.A. In 2005, he was awarded the National Outstanding Young Scientist Fund, and was appointed as the Changjiang Scholars of the Ministry of Education of the People's Republic of China (MOE) from 2009 to 2011. He is mainly engaged in theoretical research on strongly correlated electronic systems, quantum magnetism, and unconventional superconductivity physics. He is also a member of the Physics Review Group of the Academic Degrees Committee of the State Council, an Associate Editor of Acta Physica Sinica, Chinese Physics B, and Fundamental Research.

摘要/Abstract:

In this talk, I will firstly introduce the Mott insulator and Mottness, quantum spin liquid and non-Fermi liquid behavior in strongly correlated systems. Then, I will report on our recent exploration of a chiral Z3 quantum spin liquid in kagome Heisenberg model under a magnetic field. It exhibits the 1/9 magnetization plateau which is consistent with experimental observations in kagome magnets YCu3(OH)6+xBr3−x and YCu3(OD)6+xBr3−x. I will also report on a theoretical finding of two pseudogap states with Fermi arc and Fermi pocket in the triangular moir´e Hubbard model, which is suggested to be applied to twisted transition metal dichalcogenides. These pseudogap phases, as proximate states of the Mott insulator, are elaborated to be non-Fermi liquids resulting from intrinsic strong correlations.

讲座联系人/Contact:

School of Science, Zeyuan LI, Email: lizeyuan@westlake.edu.cn