Evidence for Topological Magnon-Phonon Hybridization in a 2D Antiferromagnet down to the Monolayer Limit.

Autor:	Luo J; Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States.; Applied Physics Graduate Program, Rice University, Houston, Texas 77005, United States., Li S; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States., Ye Z; Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States., Xu R; Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States., Yan H; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States., Zhang J; Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States., Ye G; Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States., Chen L; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States., Hu D; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States., Teng X; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States., Smith WA; Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States., Yakobson BI; Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States., Dai P; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States., Nevidomskyy AH; Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States., He R; Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States., Zhu H; Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States.
Jazyk:	angličtina
Zdroj:	Nano letters [Nano Lett] 2023 Mar 08; Vol. 23 (5), pp. 2023-2030. Date of Electronic Publication: 2023 Feb 16.
DOI:	10.1021/acs.nanolett.3c00351
Abstrakt:	Topological phonons and magnons potentially enable low-loss, quantum coherent, and chiral transport of information and energy at the atomic scale. Van der Waals magnetic materials are promising to realize such states due to their recently discovered strong interactions among the electronic, spin, and lattice degrees of freedom. Here, we report the first observation of coherent hybridization of magnons and phonons in monolayer antiferromagnet FePSe 3 by cavity-enhanced magneto-Raman spectroscopy. The robust magnon-phonon cooperativity in the 2D limit occurs even in zero magnetic field, which enables nontrivial band inversion between longitudinal and transverse optical phonons caused by the strong coupling with magnons. The spin and lattice symmetry theoretically guarantee magnetic-field-controlled topological phase transition, verified by nonzero Chern numbers calculated from the coupled spin-lattice model. The 2D topological magnon-phonon hybridization potentially offers a new route toward quantum phononics and magnonics with an ultrasmall footprint.
Databáze:	MEDLINE
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