题目：Novel sign structure of doped Mott insulators and its emergent physical consequences in the cuprate
报告人：翁征宇 清华大学高等研究院
地点： 教十二—201
时间： 12月27日，周五，15:30-16:30
摘要
How to mathematically characterize strongly correlated many-body electrons is one of the most challenging issues of condensed matter physics. Doped Mott insulator is a typical strongly correlated electron system which may also be responsible for the high-Tc superconductivity in the cuprate. I will first discuss a new organizing principle for the doped Mott insulator based on a novel non-Fermi sign structure of the t-J model and its key many-body quantum mechanics consequences in comparison with numerical experiments, including the exact diagonalization and density matrix renormalization group results. In the second part of talk, I will discuss the Fermi arc, two-gap structure, quasiparticle weights in nodal and antinodal regimes, peak-hump-dip in EDC and their doping dependence observed by the ARPES experiment in the high-Tc cuprate as the emergent pseudogap phenomenon due to the hidden sign structure.
个人简介
翁征宇，清华大学教授。1987年于中国科大获博士学位。在德州超导中心任研究职位多年。2001年加入清华大学高等研究院。现在主要研究兴趣与方向：凝聚态理论尤其是强关联物理的研究，量子多体系统的emergent物理现象研究与高温超导机理探索。
欢迎老师和同学参加！
