报告摘要:
Electromagnetic interaction underlies emergent phases in solid-state systems. Yet probing these interactions at the nanoscale remains a major challenge for conventional techniques. In this talk, I’ll introduce the quantum sensing architecture we have developed by combining a single NV center in diamond with scanning probe microscopy to probe local magnetic dynamics in quantum materials. As examples, I’ll first show how nanoscale quantum sensing reveals the super-Moiré magnetic order emerging in twisted antiferromagnets [1]. By extending the sensor’s dynamic range through qubit coherence control, we can also access time-dependent behavior in 2D superconductors [2]. Looking ahead, I’ll discuss our recent progress toward a better quantum sensor by interfacing molecules with 2D materials. Here, we demonstrated the first optically addressable spin qubits at surfaces, that mitigate the dephasing common to near-surface defects. Together, I hope to convey a perspective on how quantum sensing can transform our ability to visualize, understand, and ultimately engineer quantum matter at surfaces.    

[1]   King Cho Wong, et al. "Super-Moire Spin Textures in Twisted Antiferromagnets" Nature Nanotechnology (2026).
[2]   Sreehari Jayaram, et al. "Probing Vortex Dynamics in 2D Superconductors with Scanning Quantum Microscope" Physical Review Letters, Editors’ Suggestions (2025).

报告人简介:
Dr. Ruoming Peng obtained his Ph.D. degree in electrical engineering from the University of Washington in 2022. He worked with Prof. Mo Li and studied exciton physics in 2D nanophotonic devices. After graduation, Ruoming spent a short period 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 expertise in 2D optical spectroscopy and quantum sensing. He is currently managing the scanning probe subgroup at the 3rd Institute of Physics and working on scanning quantum microscopy for emergent condensed matter phenomena.

邀请人：赵冬

联系方式：d.zhao@iphy.ac.cn