报告题目：Intrinsic and Extrinsic Time-Reversal-Odd Nonlinear Hall Effects

报告人：肖聪 助理教授，澳门大学

邀请人：王健 教授

时　间：11月29日下午2:30

方　式：腾讯会议

会议链接: https://work.weixin.qq.com/webapp/tm/NvzKZEwPOhjgQzrLZiXsc1

会议号: 352-627-184

摘要：

Intrinsic  time-reversal-odd nonlinear Hall effect determined solely by Bloch band  geometry has attracted extensive interests since the theoretical  proposal of combining it with antiferromagnetic spintronics and the  experimental observations in few-layer MnBiTe4.  However, possible extrinsic contributions and their interplay with the  intrinsic one have not been well understood. Moreover, even the concept  of nonlinear “intrinsic” contribution itself is still unclear, which has  led to very recent theoretical and experimental debates. I will first  introduce our recent work on the scaling law for time-odd second order  nonlinear transport [1], which provides a basic tool for data analysis  in low-frequency experiments. Then I will show some new understandings  on the concept of nonlinear intrinsic transport and the prediction of  high-frequency isolation of intrinsic response in a specific material  [2].  

[1] Y.-X. Huang, C. Xiao*, S. A. Yang*, and X. Li*, arXiv:2311.01219

[2] C. Xiao#, J. Cao#, Q. Niu, and S. A. Yang, arXiv:2406.11180

报告人简介：

肖聪，博士毕业于北京大学物理学院，先后在UT Austin做博士后、在香港大学担任研究助理教授。现为澳门大学助理教授。主要从事反常热电输运，自旋相关输运，非线性输运，非线性自旋电子学，二维材料层电子学，超导量子几何效应等研究。以第一或通讯作者发表论文30余篇，包括Physical Review Letters 8篇，Nature Communications 2篇。