题目：Chiral Semiconductor Tellurium: From Quantum Physics to Device Applications

报告人：牛畅 助理教授，新加坡国立大学

时间：2026年10月16日（周五）上午10:00

地点：国家脉冲强磁场科学中心C204

报告摘要：

Tellurium (Te) is a chiral elemental semiconductor whose helical crystal structure gives rise to strong spin–orbit coupling, unconventional electronic spin textures, and rich quantum transport phenomena. These properties make Te a unique platform for exploring the interplay among crystal chirality, electronic structure, symmetry, and charge transport, while also offering opportunities for ultra-low-power electronics.In this talk, I will discuss our studies of chiral two-dimensional Te, spanning fundamental condensed-matter physics to device applications. I will first introduce the electronic structure and spin–orbit-coupled transport in Te, including Landau-level physics, quantum-geometry-induced negative magnetoresistance,and transport signatures associated with chirality.I will then discuss device applications of Te, including ambipolar transistors, low-voltage electronics,superconducting hybrid devices, and monolithic 3D integration with oxide semiconductors. Overall, these studies establish chiral Te as a versatile platform that bridges unconventional quantum phenomena with scalable, energy-efficient semiconductor technologies.

报告人简介：

Dr. Chang Niu has been an Assistant Professor in the Department of Electrical and Computer Engineering at the National University of Singapore since 2026. He received his bachelor’s degree from Fudan University in 2018 and his Ph.D. from Purdue University in 2024, followed by research experience at imec. His research focuses on emerging semiconductor devices and quantum materials, including chiral materials, oxide-semiconductor electronics, monolithic 3D integration, and electronic disorder. His work spans fundamental physics to scalable electronic technologies, with the goal of translating advanced physical concepts into functional and energy-efficient electronic devices. He received the IEDM 2023 Best Paper Award and has authored or co-authored more than 60 journal and conference publications.