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  Imaging Spin-Wave Damping Underneath Metals Using Electron Spins in Diamond

Bertelli, I., Simon, B. G., Yu, T., Aarts, J., Bauer, G. E. W., Blanter, Y. M., et al. (2021). Imaging Spin-Wave Damping Underneath Metals Using Electron Spins in Diamond. Advanced Quantum Technologies, 4(12): 2100094. doi:10.1002/qute.202100094.

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qute202100094-sup-0001-suppmat.pdf (Supplementary material), 364KB
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Adv Quantum Tech - 2021 - Bertelli - Imaging Spin%u2010Wave Damping Underneath Metals Using Electron Spins in Diamond.pdf (Publisher version), 4MB
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Adv Quantum Tech - 2021 - Bertelli - Imaging Spin%u2010Wave Damping Underneath Metals Using Electron Spins in Diamond.pdf
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This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
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© The Authors. Advanced Quantum Technologies published by Wiley-VCH GmbH.

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https://arxiv.org/abs/2106.02508 (Preprint)
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https://dx.doi.org/10.1002/qute.202100094 (Publisher version)
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 Creators:
Bertelli, I.1, 2, Author
Simon, B. G.1, Author
Yu, T.3, 4, Author              
Aarts, J.2, Author
Bauer, G. E. W.1, 5, Author
Blanter, Y. M.1, 5, Author
van der Sar, T.1, Author
Affiliations:
1Department of Quantum Nanoscience, Kavli Institute of Nanoscience, Delft University of Technology, ou_persistent22              
2Huygens - Kamerlingh Onnes Laboratorium, Leiden University, ou_persistent22              
3Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
4School of Physics, Huazhong University of Science and Technology, ou_persistent22              
5WPI-AIMR & Institute for Materials Research & CSRN, Tohoku University, ou_persistent22              

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Free keywords: diamond, magnetic imaging, magnetic insulators, NV centers, quantum sensing, spin waves, spintronics
 Abstract: Spin waves in magnetic insulators are low-damping signal carriers that can enable a new generation of spintronic devices. The excitation, control, and detection of spin waves by metal electrodes is crucial for interfacing these devices to electrical circuits. As such, it is important to understand metal-induced damping of spin-wave transport, but characterizing this process requires access to the underlying magnetic films. Here it is shown that electronic sensor spins in diamond enable imaging of spin waves that propagate underneath metals in magnetic insulators. This capability is then used to reveal a 100-fold metal-induced increase in spin-wave damping. The damping enhancement is attributed to spin-wave-induced electrical currents as well as, above a certain frequency, three-magnon scattering processes. This interpretation is supported by deriving expressions for the current-induced damping and the three-magnon threshold from the Landau–Lifshitz–Gilbert equation that agree well with the observations. The detection of buried scattering centers further highlights the technique's power for assessing spintronic device quality. These results open new avenues for studying metal – spin-wave interactions and provide access to interfacial processes such as spin-wave injection via the spin-Hall effect.

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Language(s): eng - English
 Dates: 2021-09-022021-07-142021-10-29
 Publication Status: Published online
 Pages: -
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 Rev. Type: Peer
 Identifiers: arXiv: 2106.02508
DOI: 10.1002/qute.202100094
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Title: Advanced Quantum Technologies
Source Genre: Journal
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Pages: - Volume / Issue: 4 (12) Sequence Number: 2100094 Start / End Page: - Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/https://onlinelibrary.wiley.com/journal/25119044