Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers

Abstract

Realization of novel topological phases in magnonic band structures represents a new opportunity for the development of spintronics and magnonics with low power consumption. In this work, we show that in antiparallelly aligned magnetic multilayers, the long-range, chiral dipolar interaction generates bulk bands with non-zero Chern integers and magnonic surface states carrying chiral spin currents. The surface states are strictly localized and can be easily toggled between non-trivial and trivial phases through an external magnetic field. The realization of chiral surface spin currents in this dipolarly coupled heterostructure represents a magnonic implementation of the coupled wire model that has been extensively explored in electronic systems. Our work presents an easy-to-implement system for realizing topological magnonic surface states and low-dissipation spin current transport in a tunable manner.

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Cited by in corpus (9)

• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Topological Phases in Magnonics
• Observation of spin-wave moiré edge and cavity modes in twisted magnetic lattices
• Temperature-Induced Magnonic Chern Insulator in Collinear Antiferromagnets
• Electromagnetic Proximity Effect: Superconducting Magnonics and Beyond
• Anti-helical edge magnons in patterned antiferromagnetic thin film
• Topological magnon-polaron transport in a bilayer van der Waals magnet
• Finite-temperature topological magnons in honeycomb ferromagnets with sublattice asymmetries
• Chiral Magnons: Mechanisms and Research Progress