报告题目：Novel anomalous Hall effect in antiferromagnetic materials
主讲人：周建辉 中国科学院合肥物质研究院 研究员
时 间：2023年6月29日（星期四）15:30
地 点：安徽大学磬苑校区理工E楼E400
主办单位：物理与光电工程学院
欢迎各位老师、同学届时前往！
报告摘要：
The anomalous Hall effect (AHE), a protocol of various low-power dissipation quantum phenomena and a fundamental precursor of intriguing topological phases of matter, is usually observed in ferromagnetic materials with an orthogonal configuration between the electric field, magnetization, and the Hall current. In this talk, we first overview exotic phenomena (e.g., various Hall effects) of topological materials under the magnetic field. Then, based on the symmetry analysis, we find an unconventional AHE induced by the in-plane magnetic field (IPAHE) via the spin-canting effect in PT-symmetric antiferromagnetic (AFM) systems, featuring a linear dependence of magnetic field and 2π angle periodicity with a comparable magnitude to conventional AHE. We demonstrate the key findings in the known AFM Dirac semimetal CuMnAs and a new kind of heterodimensional VS2-VS superlattice with a nodal-line Fermi surface. We also discuss the experimental progress in VS2-VS superlattice.
报告人简介：
周建辉，中国科学院强磁场科学中心研究员，博士生导师。2006年本科毕业于四川师范大学，2012年博士毕业于中科院物理所，随后在美国卡内基梅隆大学和香港大学从事博士后研究，2018年4月加入中科院强磁场科学中心。一直从事凝聚态体系中贝里相位相关的新颖物性的理论研究，目前主要关注拓扑材料的反常输运理论、新奇准粒子物理（激子、等离激元）以及量子反常相关的物理效应，多个理论预言被实验证实。迄今在Nature、Physical Review Letters、Nature Communications、Advanced Materials、Nano Letters、Physical Review B等期刊发表论文四十余篇。