Title：Novel signstructure of doped Mott insulators and its emergent physical consequences inthe cuprate

Speaker：Weng Xinyu,Insistute of Advanced Studies, Tsinghua University

Location：Yuquan Campus,Teaching Building 12,room 201

Time：Friday,3:30pm,Dec.27^th ,2019

Abstract:

How tomathematically characterize strongly correlated many-body electrons is one ofthe most challenging issues of condensed matter physics. Doped Mott insulatoris a typical strongly correlated electron system which may also be responsiblefor the high-Tc superconductivity in the cuprate. I will first discuss a neworganizing principle for the doped Mott insulator based on a novel non-Fermisign structure of the t-J model and its key many-body quantum mechanicsconsequences in comparison with numerical experiments, including the exactdiagonalization and density matrix renormalization group results.In the second part of talk, I will discussthe Fermi arc, two-gap structure, quasiparticle weights in nodal and antinodalregimes, peak-hump-dip in EDC and their doping dependence observed by the ARPESexperiment in the high-Tc cuprate as the emergent pseudogap phenomenon due tothe hidden sign structure.