Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers
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...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society (APS)
2022
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| Online Access: | https://hdl.handle.net/1721.1/143750 |
| _version_ | 1811083444976877568 |
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| author | Hu, Zhongqiang Fu, Liang Liu, Luqiao |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Hu, Zhongqiang Fu, Liang Liu, Luqiao |
| author_sort | Hu, Zhongqiang |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T12:33:10Z |
| format | Article |
| id | mit-1721.1/143750 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:33:10Z |
| publishDate | 2022 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1437502023-01-27T18:29:10Z Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers Hu, Zhongqiang Fu, Liang Liu, Luqiao Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Department of Physics 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. 2022-07-15T12:00:29Z 2022-07-15T12:00:29Z 2022-05-27 2022-07-15T11:55:44Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/143750 Hu, Zhongqiang, Fu, Liang and Liu, Luqiao. 2022. "Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers." Physical Review Letters, 128 (21). en 10.1103/physrevlett.128.217201 Physical Review Letters 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. application/pdf American Physical Society (APS) APS |
| spellingShingle | Hu, Zhongqiang Fu, Liang Liu, Luqiao Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers |
| title | Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers |
| title_full | Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers |
| title_fullStr | Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers |
| title_full_unstemmed | Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers |
| title_short | Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers |
| title_sort | tunable magnonic chern bands and chiral spin currents in magnetic multilayers |
| url | https://hdl.handle.net/1721.1/143750 |
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