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- W4384200468 abstract "Helical edge states in topological insulators give counterpropagating spin current on the two parallel edges. We here propose anti-helical edge states of magnons in patterned antiferromagnetic thin films, which host copropagating spin current on the two parallel edges, where the two magnon modes with opposite chirality act like the spin. The embedded heavy metal dot array in the thin film induces interfacial Dzyaloshinskii-Moriya interactions (iDMIs), drives the magnon bands into nontrivial topological phases, characterized by spin Chern number. The resulting helical edge modes lead to spin current with the direction dependent on the sign of iDMI parameter. In a strip geometry, we combine two subsystems with two embedded metal dot arrays, which give opposite iDMI parameters. Anti-helical edge states emerge, compensated by the counterpropagating bulk confined states. Helical and anti-helical edge states are verified by the micromagnetic simulations. Our work is quite helpful in the field of magnon spintronics based on antiferromagnets." @default.
- W4384200468 created "2023-07-14" @default.
- W4384200468 creator A5002191706 @default.
- W4384200468 date "2023-07-13" @default.
- W4384200468 modified "2023-09-26" @default.
- W4384200468 title "Antihelical edge magnons in patterned antiferromagnetic thin films" @default.
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- W4384200468 doi "https://doi.org/10.1103/physrevresearch.5.033026" @default.
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