报告题目：Incommensurate magnetic states induced by ordering competition in Ba1−xNaxFe2As2

报告人：王景 副教授

报告时间：2021 年 3 月 18 日（周四）15：30

报告地点：在线报告（ 腾讯会议 ID : 714 597 266 ）

报告摘要：

Quantum criticality nearby certain magnetic phase transition beneath the superconducting dome of Ba1−xNaxFe2As2 is attentively studied by virtue of a phenomenological theory in conjunction with renormalization group approach. We report that ordering competition between magnetic and superconducting fluctuations is capable of coaxing incommensurate (IC) magnetic states to experience distinct fates depending upon their spin configurations. C2-symmetry IC magnetic stripe with perpendicular magnetic helix dominates over other C2-symmetry magnetic competitors and hints to a potential candidate for the unknown C2-symmetry magnetic state. Amongst C4-symmetry IC magnetic phases, IC charge spin density wave is substantiated to be the winner shedding light on the significant intertwining of charge and spin degrees of freedom. Meanwhile, ferocious fluctuations render a sharp fall of superfluid density alongside with dip of critical temperature as well as intriguing behavior of London penetration depth.

报告人简介：

王景，2014博士毕业于中国科学技术大学近代物理系。2014–2017年，在中国科学技术大学近代物理系和国家同步辐射实验室从事博士后工作。期间，于2016–2017年在德国德累斯顿Institute for Theoretical Solid State Physics, IFW 做访问学者。2017年至今在天津大学理学院物理系担任副教授。主要研究方向为理论凝聚态物理。

参考文献：

[1] Jing Wang, Incommensurate magnetic states induced by ordering competition in Ba1−xNaxFe2As2, arXiv:2007.14981v1 (2020).