Hybrid magnonics in hybrid perovskite antiferromagnets

Andrew H. Comstock, Chung-Tao Chou, Zhiyu Wang, Tonghui Wang, Ruyi Song, Joseph Sklenar, Aram Amassian, Wei Zhang, Haipeng Lu (), Luqiao Liu (), Matthew C. Beard () and Dali Sun ()
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Andrew H. Comstock: North Carolina State University
Chung-Tao Chou: Massachusetts Institute of Technology
Zhiyu Wang: The Hong Kong University of Science and Technology
Tonghui Wang: North Carolina State University
Ruyi Song: Duke University
Joseph Sklenar: Wayne State University
Aram Amassian: North Carolina State University
Wei Zhang: University of North Carolina at Chapel Hill
Haipeng Lu: The Hong Kong University of Science and Technology
Luqiao Liu: Massachusetts Institute of Technology
Matthew C. Beard: National Renewable Energy Laboratory
Dali Sun: North Carolina State University

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: Abstract Hybrid magnonic systems are a newcomer for pursuing coherent information processing owing to their rich quantum engineering functionalities. One prototypical example is hybrid magnonics in antiferromagnets with an easy-plane anisotropy that resembles a quantum-mechanically mixed two-level spin system through the coupling of acoustic and optical magnons. Generally, the coupling between these orthogonal modes is forbidden due to their opposite parity. Here we show that the Dzyaloshinskii–Moriya-Interaction (DMI), a chiral antisymmetric interaction that occurs in magnetic systems with low symmetry, can lift this restriction. We report that layered hybrid perovskite antiferromagnets with an interlayer DMI can lead to a strong intrinsic magnon-magnon coupling strength up to 0.24 GHz, which is four times greater than the dissipation rates of the acoustic/optical modes. Our work shows that the DMI in these hybrid antiferromagnets holds promise for leveraging magnon-magnon coupling by harnessing symmetry breaking in a highly tunable, solution-processable layered magnetic platform.

Date: 2023
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DOI: 10.1038/s41467-023-37505-w

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