报告人：蒋易凡 (上海科技大学)

时 间：2023年07月20日(周四) 下午 15:00-17:00

地 点：BET356在线体育投注网址良乡校区 理学楼B203

摘要：

Pair-density-wave (PDW) is a long-sought superconducting state with oscillating order parameter. In spite of intense effort devoted, a microscopic mechanism capable of driving such state has not yet been established in two dimensions. In this talk, I will briefly review the previous numerical studies on realizing the PDW state in strongly correlated systems and present our recent density-matrix renormalization group study a minimal spinless Fermion model with density-density interactions on six- and eight-leg honeycomb cylinders. In the lightly doped model, we find quasi-long-range PDW order with a divergent PDW susceptibility emerges when the repulsive nearest interaction exceeds a finite threshold V_c. Strickingly, this PDW state persists even on the wide lattice with multiple Fermi points on Fermi surfaces.

简历：

蒋易凡是上海科技大学的助理教授。博士毕业于清华大学高等研究院。之后于美国斯坦福大学从事博士后研究。目前的主要研究兴趣为强关联量子多体系统, 集中在用数值方法对非常规超导和阻挫量子磁体进行研究。

联系方式：yangfan_blg@bit.edu.cn

邀请人： 杨帆

网 址：http:/

承办单位：物理学院、先进光电量子结构设计与测量教育部重点实验室