Coherent Magnon-Photon Coupling in the Magnetic Semiconductor CrSBr.

Authors

Jiacheng Tang, Arjan Singh, Nicholas J Brennan, Daniel G Chica, Yi Li, Xavier Roy, Farhan Rana, Youn Jue Bae

Published in

Nano letters. Jun 30, 2025. Epub Jun 30, 2025.

Abstract

Magnon-based hybrid quantum systems are promising candidates for quantum interconnects and quantum sensors, and they offer a rich platform for exploring nonlinear magnonics and cavity-photon interactions. Two-dimensional (2D) van der Waals magnets provide a compact, atomically flat geometry that can be easily integrated into existing quantum circuits, such as superconducting resonators and qubits. Among various 2D magnets, the magnetic semiconductor CrSBr is particularly unique due to its strong spin-exciton, spin-lattice, and magnon-exciton interactions. In this work, we demonstrate coherent coupling between antiferromagnetic (AFM) magnons in CrSBr and microwave photons in a niobium-(Nb)-based-on-chip resonator. We tuned the magnon-photon coupling strength by changing the number of CrSBr flakes integrated into the Nb microwave photon resonators. This work demonstrates the first step toward integrating layered van der Waals 2D magnets into superconducting microwave circuits, with full access for microwave and optical probing.

PMID:
40586441
Bibliographic data and abstract were imported from PubMed on 01 Jul 2025.

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