Dresden 2026 – scientific programme
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O: Fachverband Oberflächenphysik
O 49: Plasmonics and nanooptics: Light-matter interaction, spectroscopy I
O 49.5: Talk
Tuesday, March 10, 2026, 15:30–15:45, HSZ/0403
Anyonic Chern Insulator in Graphene Induced by Surface Electromagnon Vacuum Fluctuations — •Xinle Cheng1, Emil Viñas Boström1, Frank Y. Gao2, Edoardo Baldini2, Dante M. Kennes1,3, and Angel Rubio1,4 — 1Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761 Hamburg, Germany — 2Department of Physics, The University of Texas at Austin, Austin, Texas, 78712 — 3Institute for Theory of Statistical Physics, RWTH Aachen University, 52056 Aachen, Germany — 4Initiative for Computational Catalysis, The Flatiron Institute, Simons Foundation, New York City, NY 10010, USA
Sub-wavelength cavities have emerged as a promising platform to realize strong light-matter coupling in condensed matter systems. Previous studies are limited to dielectric sub-wavelength cavities, which preserve time-reversal symmetry. Here, we lift this constraint by proposing a cavity system based on magneto-electric materials, which host surface electromagnons with non-orthogonal electric field and magnetic field components. The quantum fluctuations of the surface electromagnons drive a nearby graphene monolayer into an anyonic Chern insulator, characterized by anyonic quasi-particles and a topological gap that decays polynomially with the graphene-substrate distance. Our work opens a path to controllably break time-reversal symmetry and induce exotic quantum states through cavity vacuum fluctuations.
Keywords: sub-wavelength cavity; magnetoelectric material; electromagnon; Chern insulator; anyon