理学院数理讲坛（2015年第三十八讲）
报告题目：Single-Atom Magnetometry: Mapping Atomic Magnetism by Spin-Polarized Scanning Tunneling Microscopy and Spin Excitation Spectroscopy
报告人：Lihui Zhou（Max Planck Institute for Solid State Research in Stuttgart, Germany）
报告时间：10月19日（周一) 下午3:00
报告地点：理学院203
摘要：
The miniaturization of magnetic systems, of both scientific and technological interests, towards single atoms calls for a technique capable of imaging spin structures at the atomic scale, which has remained challenging because of the involved extremely low spatial and energy scales. Here I will talk about mapping atomic magnetism with a home developed technique, so-called single-atom magnetometry.
First, I will present the development of a method to measure magnetization curves of one single atom by spin-polarized STM. It is used to investigate fundamental magnetic properties like magnetic stability and low-energy indirect exchange interactions. While single-atom magnetization curves study the ground states, the spin excitation spectroscopy detects excited state properties. I use this spectroscopy to study the spin dynamics of atoms on metals. It is further used to investigate magnetic atoms on a superconducting substrate revealing delicate interplays of superconductivity, Kondo effect, and spin excitation at the atomic scale.
报告人简介：
Zhou is Staff Scientist at Quantum Materials Department in Max Planck Institute for Solid State Research in Stuttgart. He holds a physics Bachelor and Master (2003, 2006) Degree from Fudan University, and a PhD Degree (2011) from Wiesendanger group in Hamburg University in Germany. His PhD research was on mapping single-atom magnetism with spin resolved STM. He developed for the first time the method to measure magnetization curves of a single atom with STM. Currently, he uses spectroscopic imaging STM to study the electronic excitation spectrum of quantum materials. He is an expert of magnetism, UHV technique, and STM. He has built several UHV low-temperature STM setup for the study of exotic materials. Zhou has published featured scientific publications, received a number of scientific awards and given a couple of invited talks at international conferences. He has also supervised two PhD students and one Master student.
欢迎感兴趣的老师和学生参加！