Related Experiment Video
Updated: Jul 20, 2025

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
Published on: July 11, 2025
Remote gate control of topological transitions in moiré superlattices via cavity vacuum fields
Zuzhang Lin1,2, Chengxin Xiao1,2, Danh-Phuong Nguyen3
1Department of Physics, The University of Hong Kong, Hong Kong, China.
Abstract:
Placed in cavity resonators with three-dimensionally confined electromagnetic wave, the interaction between quasiparticles in solids can be induced by exchanging virtual cavity photons, which can have a nonlocal characteristic. Here, we investigate the possibility of utilizing this nonlocality to realize the remote control of the topological transition in mesoscopic moiré superlattices at full filling (one electron/hole per supercell) embedded in a split-ring terahertz electromagnetic resonator. We show that gate tuning one moiré superlattice can remotely drive a topological band inversion in another moiré superlattice not in contact but embedded in the same cavity. Our study of remote on/off switching of a topological transition provides a paradigm for the control of material properties via cavity vacuum fields.
Related Concept Videos
Standing Waves in a Cavity
Woodward–Hoffmann Selection Rules and Microscopic Reversibility
Phase Transitions
Fermi Level Dynamics
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Phase Transitions: Vaporization and Condensation
Design Example: Forces in Sluice Gate
Key variables in...

