Nonlocal magnon transport in a magnetic domain wall waveguide
Magnetic domain walls (DWs) function as a waveguide for low-energy magnons. In this paper we develop the theory for the nonlocal transport of these bound magnons through a ferromagnetic insulator (FMI) that are injected and detected electrically in adjacent normal metal leads by spin-flip scatting p...
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| Veröffentlicht in: | Physical review. B 2021-08, Vol.104 (6), Article 064434 |
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| container_title | Physical review. B |
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| creator | Hartmann, Dion M. F. Rückriegel, Andreas Duine, Rembert A. |
| description | Magnetic domain walls (DWs) function as a waveguide for low-energy magnons. In this paper we develop the theory for the nonlocal transport of these bound magnons through a ferromagnetic insulator (FMI) that are injected and detected electrically in adjacent normal metal leads by spin-flip scatting processes and the (inverse) spin-Hall effect. Our setup requires a twofold degeneracy of the magnetic ground state, which we realize by an easy axis and hard axis anisotropy, in the FMI. This is readily provided by a broad range of materials. The DW is a topologically protected feature of the system and we obtain the nonlocal spin transport through it, and thereby we provide a framework for reconfigureable magnonic devices. |
| doi_str_mv | 10.1103/PhysRevB.104.064434 |
| format | Article |
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B</jtitle><date>2021-08-01</date><risdate>2021</risdate><volume>104</volume><issue>6</issue><artnum>064434</artnum><issn>2469-9950</issn><eissn>2469-9969</eissn><abstract>Magnetic domain walls (DWs) function as a waveguide for low-energy magnons. In this paper we develop the theory for the nonlocal transport of these bound magnons through a ferromagnetic insulator (FMI) that are injected and detected electrically in adjacent normal metal leads by spin-flip scatting processes and the (inverse) spin-Hall effect. Our setup requires a twofold degeneracy of the magnetic ground state, which we realize by an easy axis and hard axis anisotropy, in the FMI. This is readily provided by a broad range of materials. 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| subjects | Anisotropy Domain walls Ferromagnetism Hall effect Magnetic domains Magnons Waveguides |
| title | Nonlocal magnon transport in a magnetic domain wall waveguide |
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