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Host: Prof. Haibiao Zhou
Venue: TDLI Meeting Room N400
Tencent meeting link: https://meeting.tencent.com/dm/983esGa4zqK9
Meeting ID: 642921849, no password
Abstract:
The scanning SQUID microscope (SSM) is a scientific instrument capable of directly visualizing the microscopic distribution of magnetic fields on a sample surface. Its magnetic sensitivity is more than ten orders of magnitude higher than that of conventional instruments such as MPMS, theoretically approaching the detection of a single electron spin. With its exceptional magnetic sensitivity and spatial resolution, SSM has been successfully applied to the study of superconducting, magnetic, and topological quantum phenomena, providing a powerful precision measurement tool for quantum materials and devices. We have developed an on-chip fabrication method for nanoSQUID probe devices that not only improves their overall performance but also enables wafer-scale production. This approach allows batch fabrication of high-performance nanoSQUID probes, providing essential technological support for the broader deployment and application of scanning SQUID microscopy systems.
Biography:
Lei Chen is a research professor at the Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences. He received his B.S. degree from Fudan University in 2003 and his Ph.D. from Florida State University in 2010. He subsequently worked as a research assistant and postdoctoral researcher at the National High Magnetic Field Laboratory and Cornell University. His research focuses on novel superconducting devices based on superconducting quantum interference devices (SQUIDs) and their applications. He invented a nanoSQUID with a completely new three-dimensional architecture, achieving state-of-the-art overall performance and establishing key technical foundations for the practical implementation of SQUID-based microscopy. To date, he has published more than 50 papers in international journals such as ACS Nano, Nano Letters, and Physical Review Letters. He was selected as an Outstanding Member of the CAS Youth Innovation Program in 2020 and received the Excellence Award in the 2024 Shanghai HaiJu Talent Innovation and Entrepreneurship Competition.