Seminar: Spontaneous translation symmetry breaking in a doped Mott insulator

Time: 3:00pm, Thursday, April 27^th, 2017

Location: Room 242, East 4 teaching building, Zijingang Campus

Zheng-Yu Weng

Institute for Advanced Study, Tsingshua University

Abstract

Based on analytic analyses and numerical simulations, I will show that the translational symmetry of the charge degree of freedom must be generally broken spontaneously in a Mott insulator upon doping. I will also discuss the limits where such a symmetry may get restored, which include the case involving pairing of doped holes, the limit that the short-range antiferromagnetic correlation gets severely diminished, or some cases where the spin rotational symmetry becomes broken. The broken translational symmetry of charge is shown to be tied to the intrinsic Mott physics, which may be closely related to the anomalous phenomenon of the high-Tc cuprate superconductor.

   

翁征宇简历

中国科技大学少年班 (1978)，物理学学士 (1982), 博士 (1987)。美国德州超导中心博士后、研究助理教授 (1987–2001)。清华大学高等研究中心 (2001), 长江学者特聘教授、杨振宁讲座教授、获国家杰出青年科学基金资助，现任高等研究院副院长。主要研究领域：凝聚态物理理论，强关联多电子体系和高温超导机理。