20211217 南方科技大学刘奇航副教授学术报告

报告题目:The rising of intrinsic magnetic topological insulators MnBi2Te4/(Bi2Te3)n

报告人:刘奇航副教授   南方科技大学

报告时间:20211217日(周五)1000

报告地点:理六栋302    邀请人:王瑞强研究员

报告内容:

        The rising of topological materials MnBi2Te4/(Bi2Te3)n with built-in magnetization provides a great platform for the realization of both Chern-insulator and axion-insulator phases, manifesting integer and half-integer quantum anomalous Hall (QAH) effects, respectively. Using both model Hamiltonian and first-principles calculations, they demonstrate that rich 2D and 3D topological phase diagrams can be established with the mapping of MnBi2Te4/(Bi2Te3)n systems. For the 2D topological phases, they provide design principles to trigger integer QAH states by tuning experimentally accessible knobs, such as slab thickness and magnetization. For the 3D topological phases, they find that the surface anomalous Hall conductivity in the axion-insulator phase is a well-localized hanging around e2/2h, depending on the magnetic homogeneity. They then discuss the potential experimental signatures of the surface anomalous Hall effect in MnBi2Te4/(Bi2Te3)n.


专家简介:

        刘奇航,南方科技大学副教授,本科及博士均毕业于北京大学6163银河.net163.am,曾任美国西北大学博士后、美国科罗拉多大学博尔德分校助理研究员;主要从事以密度泛函理论为主的凝聚态理论研究,研究兴趣包括理解材料中新奇的电学,磁学,光学,缺陷,自旋极化,拓扑等物性,以及功能导向的新型材料设计及预测。近年来的研究兴趣主要集中在本征磁性拓扑材料以及如“隐藏极化”现象等凝聚态物理中的新效应问题。工作期间以主要作者身份已发表包括Nat. Phys.Nat. Commun.Phys. Rev. XPhys, Rev. Lett.Nano Lett.JACS等多篇学术论文;署名作者共计已发表学术论文60余篇,Google Scholar统计引用超过4600次;2018年入选国家级青年人才;2020年国家重点研发计划-量子调控与量子信息重点专项(青年项目)负责人。


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