报告时间：2024年2月20日上午10：00 (10:00, Feb 20, 2024)

报告地点：物质科研楼A309会议室(Room A309, Material Science Building)

报告人: 彭若酩

报告题目/Title: Scanning Quantum Microscopy for Emergent Phases of Matter

摘要/Abstract: Visualization of nanoscale magnetic response in condensed matter systems provides a pathway

 to unravel the underlying mechanisms of spin interactions. The two-dimensional (2D) materials provide controlled and versatile platforms for exploring exotic correlated and 

topological states.In the initial segment of our study,I will present a recent breakthrough involving the 

twisted double bilayer CrI3. Our investigation brings to light the softening of magnetic anisotropy and 

the heightened magnetic competition at a small twisted angle. This magnetic competition manifests as 

a spontaneous periodic magnetic texture with a distinctive period, setting it apart from the Moire periodicity 

associated with the given twisted angle. Transitioning to the second part of my exploration, I will extend the 

inquiry into the realm of 2D superconducting systems. I will share insights into the dynamics of vortices in a 

10 nm thin exfoliated 2H-NbSe2. A noteworthy observation is the melting of vortex solids near the critical temperature, 

facilitating the re-arrangement of vortices in different cool-down cycles.

报告人简介/Curriculum Vitae: Dr. Ruoming Peng obtained his Ph.D. degree in electrical engineering from the University of Washington. He worked with Prof. Mo Li and studied the exciton behaviors in 2D nanophotonic devices. After graduation, Ruoming spent a short period of time as the Kananoff-Rice postdoc fellow at the University of Chicago and then moved to the 3rd Institute of Physics at the University of Stuttgart under the supervision of Prof. Joerg Wrachtrup. Ruoming has developed strong interests in 2D nanophotonics and quantum communication. He is now working on NV quantum microscopy for emergent condensed matter phenomena and also developing integrated quantum photonic devices on SiC.