题　目：Surface-induced Zeeman effect of moiré surface states in topological insulators

报告人：袁凡奇

单　位：上海交通大学李政道研究所

主持人：袁翔 教授

时　间：10月20日（周一）下午13:00

地　点：光学大楼A508会议室

报告内容简介：

Recently, moiré superlattices have been found on the surface of topological insulators due to the rotational misalignment of topmost layers. In this work, we study the effects of moiré superlattices on the Landé g-factor and hence Landau levels of topological surface states. We find that an extra Zeeman term besides the bulk one can be induced in moiré surface states, due to the spin-orbit coupling and moiré superlattice on the surface. As a result, the originally field-independent zeroth Landau level of moiré surface states could be tilted by the out-of-plane magnetic field.

Reference:

Haijiao Ji and Noah F. Q. Yuan, arXiv:2507.04844.

报告人简介：

Noah F. Q. Yuan got his PhD at the Hong Kong University of Science and Technology in 2017. After that he went to Massachusetts Institute of Technology as a Postdoc from 2017 to 2020. He was an Associate Professor at the Harbin Institute of Technology (Shenzhen) from 2021 to 2024. Since 2024 he joined Tsung-Dao Lee Institute, Shanghai Jiao Tong University as Tenure-track Associate Professor. His interests include mainly the theory of unconventional superconductivity, two-dimensional materials and topological materials.