报告题目：新型反对易磁电耦合

报告人：王茂原副教授   厦门大学物理科学与技术学院

报告时间：2022年 12月 8 日下午 16:00-17:00

报告地点：腾讯会议：254-579-991

报告摘要：Axion field induced topological magnetoelectric response has attracted lots of attention since it was first proposed by Qi et al. [Phys. Rev. B 78, 195424 (2008)]. Here we find a new type of anticommutative magnetoelectric response βξ (ω), which can induce a dynamical magnetoelectric current driven by a time-varying magnetic field. Unlike the Chern-Simons axion term, this magnetoelectric response term is gauge independent and nonquantized, and manifests in the systems breaking the symmetries of the time reversal, inversion, and mirror. In particular, we propose the antiferromagnetic material Mn2Bi2Te5 as a material candidate to observe dynamical magnetoelectric current, in which a large magnetoelectric response term βξ (ω) originates from band inversion.

DOI:    https://doi.org/10.1103/PhysRevLett.128.236601

报告人简介：王茂原，2020年获北京理工大学博士学位，2020年至2022年北京大学全职博士后。现厦门大学物理科学与技术学院副教授。主要研究方向是凝聚态理论与计算物理，主要通过线性与非线性响应方法结合第一性原理计算，研究各种新奇拓扑材料的各种物性，如线性与非线性反常霍尔效应、磁电耦合效应、拓扑霍尔效应等。

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