Observation of Spin-Wave Moiré Edge and Cavity Modes in Twisted Magnetic Lattices

Wang，Hanchen1,2,3; Madami，Marco4; Chen，Jilei2,5; Jia，Hao2,5; Zhang，Yu6; Yuan，Rundong1; Wang，Yizhan6; He，Wenqing6; Sheng，Lutong1; Zhang，Yuelin1; Wang，Jinlong1; Liu，Song2,5; Shen，Ka7; Yu，Guoqiang6; Han，Xiufeng6; Yu，Dapeng2,5; Ansermet，Jean Philippe5,8; Gubbiotti，Gianluca9; Yu，Haiming1,2

2023-04-01

10.1103/PhysRevX.13.021016

Physical Review X   影响因子和分区

2160-3308

2160-3308

We report the experimental observation of the spin-wave moiré edge and cavity modes using Brillouin light scattering spectromicroscopy in a nanostructured magnetic moiré lattice consisting of two twisted triangle antidot lattices based on an yttrium iron garnet thin film. Spin-wave moiré edge modes are detected at an optimal twist angle and with a selective excitation frequency. At a given twist angle, the magnetic field acts as an additional degree of freedom for tuning the chiral behavior of the magnon edge modes. Micromagnetic simulations indicate that the edge modes emerge within the original magnonic band gap and at the intersection between a mini flatband and a propagation magnon branch. Our theoretical estimate for the Berry curvature of the magnon-magnon coupling suggests a nontrivial topology for the chiral edge modes and confirms the key role played by the dipolar interaction. Our findings shed light on the topological nature of the magnon edge mode for emergent moiré magnonics.

Subject Areas Condensed Matter Physics Magnetism

SCI ; EI

英语

NI论文

其他

National Key Research and Development Program of China[2022YFA1402801] ; NSF China["12074026","52225106","U1801661"] ; China Scholarship Council (CSC)[202206020091] ; Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology[SIQSE202007] ; Italian Ministry of University and Research[2020LWPKH7]

Physics

Physics, Multidisciplinary

WOS:000985728100001

AMER PHYSICAL SOC

20231914077730

Brillouin scattering ; Degrees of freedom (mechanics) ; Energy gap ; Topology ; Yttrium iron garnet

Magnetism: Basic Concepts and Phenomena:701.2 ; Light/Optics:741.1 ; Inorganic Compounds:804.2 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Mechanics:931.1

2-s2.0-85158890779

Scopus

1.Fert Beijing Institute,MIIT Key Laboratory of Spintronics,School of Integrated Circuit Science and Engineering,Beihang University,Beijing,100191,China
2.International Quantum Academy,Shenzhen,518048,China
3.Department of Materials,ETH Zurich,Zurich,8093,Switzerland
4.Dipartimento di Fisica e Geologia,Università di Perugia,Perugia,I-06123,Italy
5.Shenzhen Institute for Quantum Science and Engineering (SIQSE),Department of Physics,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China
6.Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,University of Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing,100190,China
7.Department of Physics,Beijing Normal University,Beijing,100875,China
8.Institute of Physics,Ecole Polytechnique Fédérale de Lausanne (EPFL),Lausanne,1015,Switzerland
9.Istituto Officina Dei Materiali Del Consiglio Nazionale Delle Ricerche (IOM-CNR),C/o Dipartimento di Fisica e Geologia,Perugia,I-06123,Italy

Wang，Hanchen,Madami，Marco,Chen，Jilei,et al. Observation of Spin-Wave Moiré Edge and Cavity Modes in Twisted Magnetic Lattices[J]. Physical Review X,2023,13(2).

Wang，Hanchen.,Madami，Marco.,Chen，Jilei.,Jia，Hao.,Zhang，Yu.,...&Yu，Haiming.(2023).Observation of Spin-Wave Moiré Edge and Cavity Modes in Twisted Magnetic Lattices.Physical Review X,13(2).

Wang，Hanchen,et al."Observation of Spin-Wave Moiré Edge and Cavity Modes in Twisted Magnetic Lattices".Physical Review X 13.2(2023).