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  Nonreciprocal coherent coupling of nanomagnets by exchange spin waves

Wang, H., Chen, J., Yu, T., Liu, C., Guo, C., Jia, H., et al. (2021). Nonreciprocal coherent coupling of nanomagnets by exchange spin waves. Nano Research, 69. doi:10.1007/s12274-020-3251-5.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0007-6572-7 Version Permalink: https://hdl.handle.net/21.11116/0000-0007-AD3D-3
Genre: Journal Article

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Supplementary material (material characterization, device fabrication, measurement techniques, spin-wave dispersion at different fields, SEM images of the nanowires with different widths, coupling strength with different nanowire widths and wavenumbers, details of mircomagnetic simulations of chiral spin-wave emission, theory of spin-wave chiral dynamics including stripline magnetic field, magnon coupling by dipolar interaction, magnon damping by chiral spin pumping, phase relation between nanowires and non-Hermitian coupling and the shortest wavelength observed in the transmission spectra)
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 Creators:
Wang, H.1, Author
Chen, J.1, Author
Yu, T.2, Author           
Liu, C.1, Author
Guo, C.3, Author
Jia, H.4, Author
Liu, S.4, Author
Shen, K.5, Author
Jia, H.4, Author
Liu, T.6, Author
Zhang, J.1, Author
Cabero Z, M. A.1, 4, Author
Song, Q.4, Author
Tu, S.1, Author
Wu, M.6, Author
Han, X.3, Author
Xia, K.4, Author
Yu, D.4, Author
Bauer, G. E. W.7, 8, 9, Author
Yu, H.1, Author
Affiliations:
1Fert Beijing Institute, BDBC, School of Microelectronics, Beihang University, ou_persistent22              
2Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
3Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, ou_persistent22              
4Shenzhen Institute for Quantum Science and Engineering (SIQSE), and Department of Physics, Southern University of Science and Technology (SUSTech), ou_persistent22              
5Department of Physics, Beijing Normal University, ou_persistent22              
6Department of Physics, Colorado State University, Fort Collins, ou_persistent22              
7Kavli Institute of Nanoscience, Delft University of Technology, ou_persistent22              
8Institute for Materials Research, WPI-AIMR and CSNR, Tohoku University, ou_persistent22              
9Zernike Institute for Advanced Materials, University of Groningen, ou_persistent22              

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 Abstract: Nanomagnets are widely used to store information in non-volatile spintronic devices. Spin waves can transfer information with low-power consumption as their propagations are independent of charge transport. However, to dynamically couple two distant nanomagnets via spin waves remains a major challenge for magnonics. Here we experimentally demonstrate coherent coupling of two distant Co nanowires by fast propagating spin waves in an yttrium iron garnet thin film with sub-50 nm wavelengths. Magnons in two nanomagnets are unidirectionally phase-locked with phase shifts controlled by magnon spin torque and spin-wave propagation. The coupled system is finally formulated by an analytical theory in terms of an effective non-Hermitian Hamiltonian. Our results are attractive for analog neuromorphic computing that requires unidirectional information transmission.

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Language(s): eng - English
 Dates: 2020-11-102020-08-012020-11-162020-12-282021
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2005.10452
DOI: 10.1007/s12274-020-3251-5
 Degree: -

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Title: Nano Research
  Abbreviation : Nano Res.
Source Genre: Journal
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Publ. Info: Beijing, China : Tsinghua University Press
Pages: - Volume / Issue: 69 Sequence Number: - Start / End Page: - Identifier: ISSN: 1998-0124
CoNE: https://pure.mpg.de/cone/journals/resource/1998-0124