Quantum Phases Emerged from the Interplay between Mott Physics and Topology Band
Prof. Jian-Xin Li
Department of Physics, Nanjing University

The search for the exotic quantum phases constitutes one of the most important and hot issues in modern condensed matter physics. In this talk, I will first give a brief introduction to some modern quantum phases realized in low-dimensional (quasi-2D) materials and their properties. Then, I will present our recent theoretical investigations on the possible quantum phases and the quantum phase transitions realized in the Haldane-Hubbard model, and pseudogap in 5d transition metal oxide Sr2IrO4. In particular, we uncover a new topological phase transition in the Haldane-Hubbard model which is not accompanied with the single particle gap closing but is associated with the zeros of the single particle Green's function. And a non-magnetic topological Mott insulating phase with no gapless single particle edge states which cannot be adiabatically connected to any non-interacting Chern insulator.

About the Speaker

李建新,教授,博士生导师。从事凝聚态物理的理论研究。1993年于武汉大学获博士学位。1998年至1999年台湾“中研院”物理研究所访问学者, 2006年至2007年美国加州大学伯克利分校伯克利访问学者。2004年入选教育部“新世纪优秀人才支持计划”。2005年获国家杰出青年科学基金。2008年作为团队负责人获教育部创新团队。2008年度受聘为教育部长江学者特聘教授。主要研究领域包括:1) 强关联电子系统的理论和数值计算研究;2) 非常规超导物性和机理;3) 强自旋-轨道系统中的关联量子态、拓扑量子态和量子相变。

2016-01-22 4:30 PM
Room: A303 Meeting Room
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