报告题目：Phase manipulation and Majorana zero modes in iron-based superconductor

报告人：郝宁 研究员（中国科学院合肥物质科学研究院，强磁场科学中心）

报告时间：6月1日（星期四）上午10：00

报到地点：物理楼 313 报告厅

简介：Recent experiments reported the evidence of Majorana mode trapped by vortex, crystalline domain wall and magnetic impurity in some iron-based superconductors. For the latter two cases, the underlying physics is not settled down, and the debate is still present. We argue that the phase of superconducting pairing can be manipulated by the ferromagnetism spontaneously formed in the crystalline domain wall and the natively arising in the magnetic impurity. Such phase manipulation plays a crucial role to induce the Majorana mode. Following this line, we show that our theory can be used to understand the experimental signatures about the Majornana mode induced by crystalline domain wall in Fe(Te,Se) and by magnetic impurity in Fe(Te,Se), LiFeAs, monolayer Fe(Te,Se)/SrTiO3 and can explain the controversial observations and confusing features of the zero modes from different experiments. We also discuss the some interesting features of the Majorana mode beyond the current experiments and beyond the conventional understanding.

报告人介绍：

郝宁，中国科学院合肥物质科学研究院，强磁场科学中心研究员，中国科学技术大学博导；2006年本科毕业于山东大学；2011年博士毕业于中科院物理所；2011-2016年在美国和香港做研究；2016年获中科院百人计划支持加入强磁场科学中心，2020年获国家优秀青年基金支持。主要运用凝聚态物理相关的理论以及第一性原理计算方法研究量子材料中的新现象和新效应等，研究体系涵盖高温超导，拓扑材料，磁性材料，低维材料等。已在Phys. Rev. Lett./X/A/B, Nat. Comm., Adv. Mater.等学术期刊发表论文50多篇。

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供稿审核：刘广强

编辑审核：许士通

终审：满忠晓