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新葡萄88805官网“博约学术论坛” -蒋易凡-第400期

来源:杨帆 作者:蒋易凡 (上海科技大学) 发布时间:2023-07-20

邀请人: 杨帆

报告人: 蒋易凡 (上海科技大学)

时间: 2023-07-20

地点: 新葡萄88805官网良乡校区 理学楼B203

主讲人简介:

­新葡萄88805官网博约学术论坛系列报告

400

题目Pair density wave superconductivity: a microscopic model in two dimensions

报告人:蒋易凡 (上海科技大学)

间:20230720日(周) 15:00-17:00

点:新葡萄88805官网良乡校区 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

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