Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers
Name
PhysRevLett.128.217201.pdf
Description
Published version
Size
871.1 KB
Format
Adobe PDF
Checksum (MD5)
e144fbc391862b8ffc7a4322bb77a1a7
Author(s)
Hu, Zhongqiang
Fu, Liang
Liu, Luqiao
Date Issued
May 27, 2022
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Hu, Zhongqiang, Fu, Liang and Liu, Luqiao. 2022. "Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers." Physical Review Letters, 128 (21).
Version
Final published version
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 between propagating magnons generates bulk bands with nonzero Chern integers and magnonic surface states carrying chiral spin currents. The surface states are highly localized and can be easily toggled between nontrivial 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.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/physrevlett.128.217201
