Atomically precise engineering of quantum states in kagome metals

by Prof. Hui Chen (陈辉) (Hefei National Laboratory)

Wednesday 8 Jul 2026, 10:00 → 11:00 Asia/Shanghai

Tsung-Dao Lee Institute/N4F-N400 - meeting room (Tsung-Dao Lee Institute)

Host: Prof. Haibiao Zhou  

Venue: TDLI Meeting Room N400

Tencent Meeting link: https://meeting.tencent.com/dm/n4ZBarHKc8oP

Meeting ID: 436736269, no password

 

Abstract:

Atomically precise engineering of quantum states is essential for developing practical quantum applications. However, achieving such control remains challenging because complex crystal lattices are difficult to modify with atomic-scale precision. The recently discovered layered kagome metals AV3Sb5 (A = K, Rb, Cs), which host a cascade of novel quantum states, have attracted significant interest. In addition, magnetic kagome metals have emerged as ideal platforms for investigating the interplay between spin and charge degrees of freedom. In this talk, I will present our recent work on the atomically precise engineering of quantum states in kagome metals using ultralow-temperature scanning tunneling microscopy/spectroscopy (STM/STS). First, I will discuss the discovery of emergent superconductivity and a primary pair-density wave (PDW) at the reconstructed surface associated with the bulk charge-density-wave (CDW) order in kagome metal CsV3Sb5. Next, I will demonstrate the emergence of a spatially anisotropic Kondo resonance intertwined with the superconducting gap, enabled by introducing magnetic Cr impurities into the kagome superconductor CsV3Sb5 [2]. Finally, I will show the unconventional spin-intertwined charge density wave (CDW) in magnetic kagome metal GdTi3Bi4 [3]. Our findings provide a pathway for manipulating novel many-body states in kagome metals.

 

References：

[1] X. Han, H. Chen#*, H.-J. Gao* et al. Nature Nanotechnology 20, 1017 (2025)

[2] Z. Huang, H. Chen#*, H.-J. Gao* et al. Nature Physics (2026) https://doi.org/10.1038/s41567-026-03292-6

[3] X. Han, H. Chen#*, H.-J. Gao* et al. Nature Commun. 17, 2667 (2026)

 

Biography:

Hui Chen received his Ph.D. from the Institute of Physics, Chinese Academy of Sciences (IOP-CAS), where he later served as an associate professor from 2020 to 2026. He has recently joined Hefei National Laboratory as a full professor. His research focus on ultra-low-temperature, high-magnetic-field scanning tunneling microscopy/spectroscopy, with particular emphasis on atomic-scale manipulation of low-dimensional quantum structures, such as graphene origami, and emergent quantum phenomena in correlated and topological materials, including spin–orbit polarons and pair-density waves in kagome-lattice materials.