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  Giant oscillatory Gilbert damping in superconductor/ferromagnet/superconductor junctions

Yao, Y., Cai, R., Yu, T., Ma, Y., Xing, W., Ji, Y., et al. (2021). Giant oscillatory Gilbert damping in superconductor/ferromagnet/superconductor junctions. Science Advances, 7(48): eabh3686. doi:10.1126/sciadv.abh3686.

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© The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.
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Supplementary Materials and Methods: Supplementary Materials and Methods, Figs. S1 to S11, References
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https://dx.doi.org/10.1126/sciadv.abh3686 (Publisher version)
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https://arxiv.org/abs/2111.03233 (Preprint)
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 Creators:
Yao, Y.1, 2, Author
Cai, R.1, 2, Author
Yu, T.3, Author              
Ma, Y.1, 2, Author
Xing, W.1, 2, Author
Ji, Y.1, 2, Author
Xie, X.-C.1, 2, 4, 5, Author
Yang, S.-H.6, Author
Han, W.1, 2, Author
Affiliations:
1International Center for Quantum Materials, School of Physics, Peking University, ou_persistent22              
2Collaborative Innovation Center of Quantum Matter, 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              
4CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, ou_persistent22              
5Beijing Academy of Quantum Information Sciences, ou_persistent22              
6IBM Research–Almaden, ou_persistent22              

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 Abstract: Interfaces between materials with differently ordered phases present unique opportunities for exotic physical properties, especially the interplay between ferromagnetism and superconductivity in the ferromagnet/superconductor heterostructures. The investigation of zero- and π-junctions has been of particular interest for both fundamental physical science and emerging technologies. Here, we report the experimental observation of giant oscillatory Gilbert damping in the superconducting niobium/nickel-iron/niobium junctions with respect to the nickel-iron thickness. This observation suggests an unconventional spin pumping and relaxation via zero-energy Andreev bound states that exist not only in the niobium/nickel-iron/niobium π-junctions but also in the niobium/nickel-iron/niobium zero-junctions. Our findings could be important for further exploring the exotic physical properties of ferromagnet/superconductor heterostructures and potential applications of ferromagnet π-junctions in quantum computing, such as half-quantum flux qubits.

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Language(s): eng - English
 Dates: 2021-03-042021-10-062021-11-26
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1126/sciadv.abh3686
arXiv: 2111.03233
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Title: Science Advances
  Other : Sci. Adv.
Source Genre: Journal
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Publ. Info: Washington : AAAS
Pages: - Volume / Issue: 7 (48) Sequence Number: eabh3686 Start / End Page: - Identifier: ISSN: 2375-2548
CoNE: https://pure.mpg.de/cone/journals/resource/2375-2548