报告题目：Probing collective and individual quantum spins with STM

报告人：陈一 助理教授（北京大学）

邀请人：蒋尚达 教授

时间：2023年5月12日16:00 - 17:30

地点：广州国际校区 C2a-207

欢迎广大师生踊跃参加。

自旋科技研究院

2023年5月11日

报告摘要：

Recent years have witnessed growing interests in quantum spin systems at two frontiers. Many-body spin systems are heavily investigated for new phases of matter and exotic excitations therein, while individual quantum spins are harnessed as quantum information carriers and quantum sensors. This talk focuses on a special class of quantum spins at material surfaces that are probed and controlled by a scanning tunneling microscope (STM). In the first part of this talk, I will discuss collective quantum spin liquid behavior in single-layer 1T-TaSe₂, a newly discovered 2D Mott insulator predicted to host a Fermi sea of itinerant spinons. In the second part of my talk, I will introduce techniques to coherently control individual spins using an STM, as well as recent efforts towards multi-spin quantum control beyond the spin in the tunnel junction. Finally, I will discuss future possibilities of performing quantum sensing at the atomic scale.

报告人简介：

Yi Chen received B.S. in physics from Peking University in 2014 and Ph.D. in Physics from University of California, Berkeley in 2020. At Berkeley, he worked with Mike Crommie on scanning probe studies of two-dimensional correlated materials. Following his graduate studies, Yi Chen became a postdoctoral researcher at Center for Quantum Nanoscience, working with Andreas Heinrich on exploring quantum coherence with atomic probe techniques. Yi Chen joined Peking University as an Assistant Professor in February 2023.