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Magnon-Cooparons in magnet-superconductor hybrids

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2022

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Bobkova, Irina V.
Bobkov, Alexander M.

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Communications Materials. Springer Nature. 2022, 3, 95. eISSN 2662-4443. Available under: doi: 10.1038/s43246-022-00321-8

Zusammenfassung

Generation and detection of spinfull Cooper pairs in conventional superconductors has been intensely pursued by designing increasingly complex magnet-superconductor hybrids. We demonstrate theoretically that magnons with nonzero wavenumbers universally induce a cloud of spinfull triplet Cooper pairs around them in an adjacent conventional superconductor. The resulting composite quasiparticle, termed magnon-cooparon, consists of a spin flip in the magnet screened by a cloud of the spinfull superfluid condensate. Thus, it inherits a large effective mass, which can be measured experimentally. Furthermore, we demonstrate that two magnetic wires deposited on a superconductor serve as a controllable magnonic directional coupler mediated by the nonlocal and composite nature of magnon-cooparons. Our analysis predicts a quasiparticle that enables generation, control, and use of spinfull triplet Cooper pairs in the simplest magnet-superconductor heterostructures.

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530 Physik

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Magnons, Cooper pairs, superconductors

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ISO 690BOBKOVA, Irina V., Alexander M. BOBKOV, Akashdeep KAMRA, Wolfgang BELZIG, 2022. Magnon-Cooparons in magnet-superconductor hybrids. In: Communications Materials. Springer Nature. 2022, 3, 95. eISSN 2662-4443. Available under: doi: 10.1038/s43246-022-00321-8
BibTex
@article{Bobkova2022-03-10T12:32:56ZMagno-56895.2,
  year={2022},
  doi={10.1038/s43246-022-00321-8},
  title={Magnon-Cooparons in magnet-superconductor hybrids},
  volume={3},
  journal={Communications Materials},
  author={Bobkova, Irina V. and Bobkov, Alexander M. and Kamra, Akashdeep and Belzig, Wolfgang},
  note={Deutsche Forschungsgemeinschaft (DFG; German Research Foundation) via a DFG-RSF project (ID 443404566) Article Number: 95}
}
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Deutsche Forschungsgemeinschaft (DFG; German Research Foundation) via a DFG-RSF project (ID 443404566)
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